Tag Archives: tungsten

Allgemein

Responsible Gold Audit successfully passed

Heraeus certified as a refiner of conflict-free gold products by the London Bullion Market Association

Responsible Gold Audit successfully passed

PwC confirms that Heraeus´ internal rules comply with the LBMA requirements.

Precious metals and technology group Heraeus (http://heraeus-precious-metals.com/) has been certified by PricewaterhouseCoopers (PwC) for the past business year 2013 as a refiner of conflict-free gold products in accordance with the standards of the London Bullion Market Association ( LBMA (http://www.lbma.org.uk/) ). The LBMA has set up a guidance system for gold which is mandatory for its members. It certifies that its members have no involvement in extracting the precious metal from regions affected by armed conflicts or serious violations of human rights. Argor Heraeus is accordingly also being independently certified. Since the financial year 2012, PricewaterhouseCoopers (PwC) conducts annual audits with Heraeus, among others in Hanau (Germany), Hong Kong (China) and at the premises in Newark, NJ (USA).

Established Rules
PwC confirms that Heraeus´ internal rules comply with the LBMA requirements and in many cases even exceed them. The guidelines of Heraeus are not limited to Gold only but focus on all precious metals and additional special metals, particularly on the 3 T´s: tungsten, tin, and tantalum. The Responsible Gold audit confirms that the individual business units of Heraeus as well as its precious metals trade only use conflict-free products.

Mines audited
Heraeus uses a number of indicators to be able to exclude systematically contributing to conflicts, human rights violations, environmental pollution as well as child and forced labor worldwide. All mines Heraeus cooperates with have been audited in this regard, either by Heraeus itself or by independent audit firms. Heraeus also requests that its trading partners for precious metals confirm their compliance with this sourcing policy.

Background information: LBMA
The LBMA is an international organization setting trading standards as well as uniform conditions for its members with regard to the quality standards for gold and silver bullions. In addition to the physical product requirements, this also includes sustainability aspects. The OECD (http://www.oecd.org) (Organisation for Economic Co-operation and Development) defines in its guidance the so-called conflict minerals and their handling in the supply chain of companies.
The conflicts caused by the extraction of raw materials around the Democratic Republic of Congo in central Africa were the reason for the LBMA in cooperation with the OECD to regulate the requirements for producers of so-called Good Delivery products, also regarding their sourcing.

The Hanau-based precious metal and technology group Heraeus is a globally active family-run enterprise with a history of more than 160 years. We provide high-end solutions to our customers to lastingly strengthen their competitive position. Our areas of competence include precious metals, materials and technologies, sensors, biomaterials and medical devices, quartz glass and specialty light sources. In the financial year 2013, Heraeus achieved a revenue from the sale of products of EUR3.6 bn, while the revenue from precious metal trading was EUR13.5 bn. With about 12,500 employees in more than 110 companies world-wide, Heraeus is in a leading position on its global sales markets.

Kontakt
Heraeus Precious Metals GmbH & Co. KG
Guido Matthes
Heraeusstr. 12-14
63450 Hanau
+49-6181.35 4583
guido.matthes@heraeus.com
http://www.heraeus-clevios.com

Allgemein

PLANSEE Express: Now Purchase Furnace Parts Online

It“s getting hot at PLANSEE Express! The leading online shop for refractory metals such as molybdenum and tungsten is now also offering finished parts for high-temperature furnaces.

In addition to plate, rod, wire and welding electrodes, molybdenum, TZM and tungsten threaded rods, pins, tube, rivets, washers and nuts are now available at www.plansee-express.com for high-temperature furnace applications. These materials are used in applications where conventional metals reach their limits and are no longer options. With their durability and dimensional stability, they maintain their reliability under extreme high-heat conditions and also when frequent cycling occurs.
For the first time, ceramic insulators and tubes can also be ordered from PLANSEE Express. These products are available directly from stock and with rapid delivery.
The PLANSEE online shop is open world-wide, and is constantly adding new product groups and materials to its online assortment. Keep visiting us to stay up-to-date.
Besides standard products, PLANSEE of course develops and manufactures tailored components for high temperature furnaces – like metallic hot zones and heating elements, radiation shields, furnace fixtures, hearth components, crucibles, as well as annealing and sintering boats.

Interested in our engineering services? We can tailor solutions to your application. Contact us!

PLANSEE High Performance Materials (HPM)
The Plansee Group is a world leader in powder metallurgy development and production, covering the entire range of production processes, from ore to customer-defined components.
The PLANSEE High Performance Materials Division sets the standards when it comes to components made of molybdenum, tungsten, tantalum, and niobium. Whether for electronics, coating technology or for high temperature furnaces – – – where conventional metals reach their limits, PLANSEE alloys and composites come into play.

Learn more about PLANSEE and find your local contact here: www.plansee.com

Your contact person for further questions and information:
Julia Haslwanter
Phone.: +43 5672 600 – 2559
julia.haslwanter@plansee.com

PLANSEE High Performance Materials

The Plansee Group is a leader in the field of powder metallurgy, covering the entire production process from the ore right through to customer-specific components.

The corporate division PLANSEE High Performance Materials is an expert for components manufactured from molybdenum, tungsten, tantalum, niobium and chromium. Alloys and composite materials from PLANSEE come into their own in electronics, coating technology or high-temperature furnaces – wherever traditional materials are stretched beyond their limits.

Find out more about PLANSEE and locate your local contact: www.plansee.com

Kontakt:
PLANSEE SE
Nadine Kerber
Metallwerk-Plansee-Str. 71
6600 Reutte
+43 5672 600 2422
nadine.kerber@plansee.com
http://www.plansee.com

Allgemein

Only the best survive.

Nuclear fusion heat exchanger to become ready for series production for ITER.

Only the best survive.

The current reference design of heat exchangers for the ITER divertor involves monoblocks manufactured from tungsten and carbon fiber reinforced graphite (CFC) that are joined to a CuCrZr alloy tube using a patented joining technology from PLANSEE

Seven nations are currently working together on building a nuclear fusion plant as part of ITER (International Thermonuclear Experimental Reactor), the world’s most extensive fusion experiment. For the first time, the plant is intended to deliver more power than is required for generating and maintaining the plasma. Some of the requirements on the components stretch the limits of what can be achieved with today’s technology. Test scale components from PLANSEE have already proved themselves and have made a significant contribution to the reference design of the forthcoming ITER plant. PLANSEE was recently awarded the contract for manufacturing full-scale prototypes. This final stage before series manufacturing is a serious challenge, and only three companies worldwide were able to qualify.

But let’s start at the beginning. How does nuclear fusion work? Energy is released when hydrogen nuclei fuse to form helium nuclei. That is the simple recipe for success behind this environmentally friendly and sustainable source of energy. The shining example of this process is the sun, which also generates energy on the same principle. But although it may sound simple, it is in fact the result of the complex interplay of many factors. In the nuclear fusion plant, hydrogen gas will be heated to temperatures in excess of 100 million °C. This produces a plasma in which the electrons are separated from the nuclei. At these extreme temperatures, hydrogen nuclei possess sufficient kinetic energy to collide with each other despite the repulsive electric force between them and fuse to form helium nuclei. Recoverable energy is released during this nuclear fusion process.

A magnetic field encloses the hot plasma in order to maintain the fusion process and to protect the components of the plant as well as possible. Only very few components come into contact with the outer regions of the plasma. One area which becomes particularly hot is the divertor. At particular points in the magnetic field, generally near the bottom of the plasma vessel, the helium ions and impurities in the plasma are guided towards the divertor. There, the ions are slowed down and electrically neutralized. In order to prevent the divertor components from melting or even vaporizing, the heat that has been generated must be removed as quickly as possible. If the divertor is unable to withstand the extreme stress, the continuous operation of the fusion plant is simply not possible. As a result, only composites that can withstand an extremely high level of generated heat of up to 20 MW/m2 and are capable of resisting the ceaseless attack of electrons, ions and impurities are used in the divertor. In principle, the divertor is made up of a highly efficient heat sink for dissipating the heat protected by an armor. The armor protects the heat sink from being damaged by the hot plasma during operating conditions. Tungsten and carbon are the materials of choice for this armor. These materials are particularly heat resistant and dissipate heat very efficiently. Unlike carbon, tungsten does not bind a large amount of hydrogen and has a low interaction with the plasma resulting in lower impurity levels of the plasma. This makes tungsten a particularly suitable material in highly loaded areas of the first wall of nuclear fusion plants.
As the undisputed expert for refractory metals, PLANSEE manufactures armor composites for the divertor made from carbon fiber reinforced carbon (CFC) and tungsten monoblocks and joins the armor to the copper/chromium/zirconium-based heat sinks. The particular expertise of PLANSEE lies not only in the resilient materials themselves, but also in the joining technology used within the composite. Once the fusion plant has been taken into operation, any repairs represent a huge outlay in terms of time and money. Any downtime of the plant, no matter how short, is an expensive exercise. Only a perfect joint between the armor and the heat sink prevents overheating and damage to the divertor. PLANSEE has developed and patented its own joining process specifically for the nuclear fusion industry: „active metal casting“. This method ensures that heat is transmitted to the heat sink extremely efficiently and reliably.

Over the course of the coming months, the team from PLANSEE will be working together with a large number of engineers and production staff to construct the first full-scale partial segments of the divertor for ITER. All the individual steps in production must be perfectly coordinated and technically harmonized. Joining some 130 armor blocks to the backing tubes of the heat sink in a single step without the slightest error is just one of the many challenges to be overcome during the project. Traditional quality assurance measures are not appropriate to the complexity of this development task. In order to be absolutely certain, PLANSEE has developed its own non-destructive testing methods for ITER based on thermographic and ultrasound techniques.

Stress testing on all ITER prototypes should be completed successfully by mid-2014. Series production of the ITER components can then start.

PLANSEE High Performance Materials

The Plansee Group is a leader in the field of powder metallurgy, covering the entire production process from the ore right through to customer-specific components.

The corporate division PLANSEE High Performance Materials is an expert for components manufactured from molybdenum, tungsten, tantalum, niobium and chromium. Alloys and composite materials from PLANSEE come into their own in electronics, coating technology or high-temperature furnaces – wherever traditional materials are stretched beyond their limits.

Find out more about PLANSEE and locate your local contact: www.plansee.com

Kontakt:
PLANSEE SE
Nadine Kerber
Metallwerk-Plansee-Str. 71
6600 Reutte
+43 5672 600 2422
nadine.kerber@plansee.com
http://www.plansee.com

Allgemein

PLANSEE Express online shop for semi-finished and standard products opens to the Japaense market

PLANSEE Express online shop for semi-finished and standard products opens to the Japaense market

PLANSEE Express now also available in Japan

Starting right now, semi-finished and standard products can also be ordered in Japan at PLANSEE“s worldwide online shop. Extra-fast and on-time, the ordered products are shipped from Esashi, Japan. Our staff in the Tokyo office will provide the accustomed local customer service; a further site of PLANSEE SE, headquartered in Reutte, Austria.

Whether sheets, foils, rods, wires or TIG welding electrodes – the largest range of products made of molybdenum, tungsten, tantalum and their alloys has been available to PLANSEE customers since autumn 2010.

A new addition for the Japanese shop are PLANSEE evaporation boats made of three different materials and their alloys. It is presented with a graphic illustration and technical drawing of the boat. In addition, the customer receives all relevant information directly on the monitor, such as tank length, fill volume, and the required dimensions.

With the Japan launch, the worldwide rollout of the shop is complete. In the future, more application features will be added, making the shopping experience more enjoyable and faster for the customer. Furthermore, additional products and materials will be added to the shop.

Visit PLANSEE Express at www.plansee-express.com

Questions? Your personal PLANSEE Express contacts:

PLANSEE SE, Reutte / Austria, Mag. Julia HASLWANTER, julia.haslwanter@plansee.com, Tel.: +43 5672 600 2559, www.plansee.com

PLANSEE Japan Ltd., Tokyo / Japan, Rie TAKAYAMA, rie.takayama@plansee.com, Tel.: +81 3 3568 2451, www.plansee.co.jp

PLANSEE SE

The Plansee Group is a leader in the field of powder metallurgy, covering the entire production process from the ore right through to customer-specific components.

The corporate division PLANSEE SE is an expert for components manufactured from molybdenum, tungsten, tantalum, niobium and chromium. Alloys and composite materials from PLANSEE come into their own in electronics, coating technology or high-temperature furnaces – wherever traditional materials are stretched beyond their limits.

Find out more about PLANSEE and locate your local contact: www.plansee.com

Kontakt:
PLANSEE SE
Nadine Kerber
Metallwerk-Plansee-Str. 71
6600 Reutte
+43 5672 600 2422
nadine.kerber@plansee.com
http://www.plansee.com

Allgemein

Brilliant performance in sapphire growth.

How ultra-smooth crucibles save on production costs.

Brilliant performance in sapphire growth.

Tungsten crucibles with ultra-smooth surface. The sapphire can be extracted without difficulty.

Ultra-pure sapphire is used in the production of LED lights. The Kyropoulos method is in widespread use. This involves melting a sapphire crystal in a heat-resistant crucible made from molybdenum or tungsten. One particularly critical stage during this production process is when the sapphire crystal is extracted from the crucible. The easier the sapphire can be released from the crucible, the greater the yield and quality of the sapphire. If the surface of the crucible is too rough, the sapphire cannot be released or can only be partially released from the wall of the crucible, which results in cracks and faults in the crystal. Not only that: The crucible itself is also damaged in the process and has to be reworked or replaced earlier than planned.

A fully automated manufacturing process coupled with more than 90 years of experience in the field of powder metallurgy allow PLANSEE to exercise precise control over the material properties of refractory metals such as tungsten and molybdenum. In order to reduce the costs of sapphire growth, the materials experts developed a special cost-saving pressed-sintered tungsten crucible with an ultra-smooth surface. With its surface roughness of less than 0.8 µm, sapphire growth is now a smooth operation: The sapphire can be extracted from the crucible without difficulty and without damaging the surface of the crucible. For the sapphire producers, this results in less complex and expensive reworking of the surface of the crucible. The cycles run smoothly and deliver high-quality ingots. And there’s another advantage: The smooth surface is less susceptible to corrosion caused by the aggressive melted sapphire. This increases the service life of the reusable tungsten crucibles.

And the tungsten crucible from PLANSEE also scores in terms of density. Why is that important? Crucibles with a low density and a large number of porous areas can shrink under the high process temperatures. This means that they become more dense in use and can thus become seriously deformed or even break. PLANSEE, the experts in powder metallurgy, finely adjusts the sintering process for the crucibles. Sintering is performed at very high temperatures and a uniform temperature distribution. This gives the tungsten crucibles a very high material density of 93 % coupled with an extremely homogeneous density distribution. Even under high temperatures and rapid changes of temperature, the crucible is guaranteed to retain its shape.
So what about purity? Contaminants in the plant components can be transferred to the sapphire in a way that is detrimental to its quality. Iron, titanium and chromium are particularly critical in this respect. To ensure that only flawless sapphire comes out of the crucible, PLANSEE has adopted an ultra-clean production process. Everything from the metal powder to the finished crucibles is manufactured in-house. This allows every step to be carefully monitored, and the resulting crucibles are of an exceptional purity in excess of 99.97 %.
Nowadays, crucibles large enough for 35 kg up to 100 kg of sapphire are commonplace. And yet the industry is already considering a new generation for up to 200 kg of sapphire. PLANSEE’s extremely large sintering plants and processing machines mean that they are already geared up to take this step.

June 19-12, 2012 PLANSEE will already be showcasing their products for sapphire growth at the Display Taiwan trade show. You will find the PLANSEE team on stand I112.

PLANSEE supplies the sapphire growth industry with pressed-sintered crucibles made of tungsten and molybdenum and a wide range of plant components from hot zones through to spare parts made from refractory metals. PLANSEE handles the entire production process from the powder, through the semi-finished product, right up to complete products that are ready to install, and this includes all the related research and development work.

Find out more about PLANSEE and locate your local contact: www.plansee.com

PLANSEE is one of the world“s leading companies in powder metallurgy. Founded as a privately-owned enterprise in 1921, our expertise is in high melting metals and composite materials. Whether in furnace construction, in the electronics or coating industry, when conventional materials reach their limits, PLANSEE goes beyond the boundaries. PLANSEE manufactures and markets its products worldwide.

Kontakt:
PLANSEE SE
Nadine Kerber
Metallwerk-Plansee-Str. 71
6600 Reutte
+43 5672 600 2422
nadine.kerber@plansee.com
http://www.plansee.com