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Molybdenum is a lustrous, silvery metal with a melting point of 2620°C (4748°F) and a boiling point of 5560°C (10,040°F). Molybdenum has high strength and stiffness and …
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Hafnium (Hf), 99.5%HF (2n5), 99.9%Hf (3N) Eagle Alloys Corporation (EAC) is a leading global supplier of Hafnium (Hf) in foil, strip, sheet, plate, discs, wire, rod, bar, blanks, pipe, tubing, fittings, crucibles, sputtering targets as well as semi-finished and finished parts, custom sizes, and custom grades. Eagle Alloys Corporation is an ISO ...
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refractory metals hafnium and molybdenum were added in small amounts (0.5 and 1.0 at.% respectively) because of their well-known positive effects on mechanical properties of Ni-based superalloys.
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The molybdenum alloy of greatest technological importance is the high-strength, high-temperature alloy TZM. The material is manufactured either by P/M or arc-cast processes. ... alloys have been developed in which …
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Molybdenum alloys are commonly used as tool material for high-temperature deformation processes like forming or forging. For these types of application, the material has to withstand static load at elevated temperatures. To investigate the high-temperature performance of the material, uniaxial hot tensile tests were performed on a Mo-1.2% Hf …
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In the present study the material of interest is a particle strengthened molybdenum–hafnium–carbon alloy denoted as MHC, which is powder metallurgically produced. The main field of application is for metal forming tools such as extrusion dies and dies for isothermal forging of superalloys and titanium alloys. Recent applications of …
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Types of Superalloys – 1. Titanium-Based Alloy. James A. Davidson and others developed a series of new titanium molybdenum hafnium titanium-base alloys. The alloy contains 5% to 11% molybdenum, 6% to 15% hafnium, and at least one of titanium, chromium, and silicon, with a content of 2% to 3%. In addition, the alloy contains trace …
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It was revealed that hafnium is a strong solid solution hardener in molybdenum. In the course of this paper it was shown that the SSH of the Mo–Hf …
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Atomic displacement in the CrMnFeCoNi high-entropy alloy – A scaling factor to predict solid solution strengthening. Although metals strengthened by alloying have been used for millennia, models to quantify solid solution strengthening (SSS) were first proposed scarcely seventy years ago. Early models could predict….
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Nickel-rich (54–56 at.% Ni) NiTi-based alloys have gained increased attention for their high hardness, corrosion resistance, strength, and wear resistance, leading to their development for high-performance bearings and other wear applications. An investigation of a broader compositional range of NiTiHf alloys, in terms of Ni and Hf content, is …
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Journal Article: Reactions of hafnium nitride with molybdenum, tungsten, and tantalum. Reactions of hafnium nitride with molybdenum, tungsten, and tantalum. ... of internally nitrided Mo-1.86 wt % Hf is more than 100 times greater than that of other commercially available molybdenum-base alloys. The HfN precipitates appear to be stable over ...
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low-alloyed molybdenum-based alloys strengthened with HfC. Investigations into the C-Hf-Mo phase relations and structures are given in Table 1. Binary Systems The binary …
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@article{osti_6428184, title = {High temperature phase diagrams for zirconium--molybdenum and hafnium--molybdenum}, author = {Garg, S P and Ackermann, R J}, abstractNote = {The high temperature regions of the Zr-Mo and Hf-Mo binary phase diagrmas have been constructed from temperature-composition data obtained by …
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Molybdenum 20 10 Nickel 50 25 30 Niobium 100 5 Nitrogen 100 10 50 120 Oxygen 400 60 1000 † Silicon 100 25 25 Tantalum 200 5 <100 ... Hafnium Alloy Addition . Fires, when they do occur, can be extinguished when they are small using salt, sand, metal, or type D fire extinguisher. For larger
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A narrowly defined class of refractory metals would include metals with melting points > 2000°C: niobium, chromium molybdenum, tantalum, tungsten, and rhenium [1], while a wider class would also include those with melting points above 1850°C: vanadium, hafnium, titanium, zirconium, ruthenium, osmium, rhodium, and iridium.
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The most common rhenium containing alloys are molybdenum-41wt% rhenium (Mo41%Re) and molybdenum-47.5wt% rhenium (Mo47.5%Re). ... components have forced the development of novel processing techniques for tungsten-rhenium and tungsten-rhenium with hafnium carbide. Tungsten - rhenium alloys with a melting point of 3050°C and a …
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Commonly controlled alloy elements could be as many as 14 or so in some alloys. Nickel and cobalt as well as chromium, tungsten, molybdenum, rhenium, hafnium and other elements used in superalloys are often expensive . Steels will be affected with higher corrosion at elevated temperature applications.
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Intensive research in the 60ies and 70ies of the last century with various arc-melted Mo–Hf–C alloys led to the development of a molybdenum base alloy with a …
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C103 niobium-hafnium alloy is used as a refractory material in the aerospace industry. It has a high-temperature strength above 1300°C and is easy to be coated to resist oxidation. ... Molybdenum crucible is widely used in metallurgical industry, rare earth industry, artificial crystal, machinery and other fields, and its purity can prevent ...
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@article{osti_4792606, title = {PHASE RELATIONSHIPS IN THE NICKEL-ZIRCONIUM AND THE NICKEL-HAFNIUM ALLOY SYSTEMS}, author = {Kirkpartick, M E and Larsen, W L}, abstractNote = {The phase diagram for the nickel- zirconium alloy system was established through solidus and liquidus temperature determinations, temperature vs …
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Molybdenum Hafnium Carbide (or Carbon) Alloy is a particle-reinforced molybdenum-based alloy containing hafnium carbide in the proportions of 0.8-1.4% hafnium and 0.05-0.15% carbon. MHC is a high strength alloy with high thermal conductivity and creep …
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Molybdenum Alloy. Molybdenum alloy has high strength, moderate density, and low price in high-temperature applications. It is the largest refractory metal alloy used in industry. ... (Ta-Nb), and Tantalum Hafnium Alloy (Ta-Hf). Some examples of these are Ta-12W, Ta-10W, ASTAR-811C, T-111, and T-222. Tantalum alloys are better …
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Abstract. In the present study the solid solution softening of molybdenum–hafnium alloys (0.15–3.0 at.%) was investigated at homologous …
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MHC (Molybdenum-Hafnium-Carbon) MHC is a particle-reinforced molybdenum-based alloy, which contains both hafnium and carbon. Thanks to the uniformly distributed, extremely fine carbides, the material benefits from outstanding heat and creep resistance and, at 1550 °C, the maximum operating temperature is 150 °C higher than that of TZM ...
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In both alloys containing tantalum and molybdenum, as well as in binary compounds, hafnium is also an excellent refractory material. With a melting point of over 3,890°C, hafnium carbide (HfC) makes one of the most refractory binary materials around. ... It is also used in gas filled and incandescent lights. Hafnium alloys with several other ...
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It is the purpose of this paper to réexamine data on the behavior of molybdenum- and tungsten-based alloys which are strengthened by hafnium carbide. This reanalysis suggests that claims of … Expand
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Titanium molybdenum hafnium alloy . United States Patent 6200685 . Abstract: This invention describes a corrosion-resistant, high-strength, low-modulus, titanium based alloy having about 5-11 weight percent Mo and about 6-15 weight percent Hf. This alloy is suitable for use in the fabrication of articles for medical and non-medical …
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The use of hafnium can be broken down in to three sectors: Superalloys (aerospace and non-aerospace) Plasma arc welding. Nuclear applications. Added to high temperature and nickel-based super alloys, hafnium increases resistance to corrosion, particularly in cyclic thermal conditions. The metal's high melt temperature also helps to strengthen ...
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Section snippets Material and methods. The MHC material used in this investigation was produced via a PM route. A mixture of molybdenum powder, hafnium hydride (HfH 2) powder and carbon black was cold isostatically pressed and sintered at a homologous temperature above 0.8·T M (T M is the melting point of molybdenum in …
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