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The List of Abundant Refractory Metals

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Tungsten, tantalum, molybdenum, columbium, vanadium, and chromium may be classed as relatively abundant refractory metals; that is, Free World reserves of contained metal are over 100,000 tons for each metal. The first four show promise in a considerably higher temperature range than the last two, and sometimes the term “refractory metals” is used narrowly to […]

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Top 10 Materials with Highest Melting Point in the World

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Tantalum Hafnium Carbide Alloy (3990℃) Tantalum hafnium carbide alloy (Ta4HfC5) actually refers to tantalum and hafnium pentacarbonate compound, which has the highest melting point among known compounds. It can be considered to be composed of two binary compounds, tantalum carbide (melting point 3983 ℃) and hafnium carbide (melting point 3928℃). Tantalum hafnium carbide alloys are […]

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What is The Basic Tungsten Metal Like

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Tungsten is the most plentiful of the refractory metals. However, about half of the world’s reserves are found in China. Korea is another important source along with Bolivia, Portugal, Australia, Thailand, Canada and United States. Despite its resources, the United States still must import most of its consumption. Since the late 70’s the use of […]

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What are Refractory Metals

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Refractory metals are different. As a group they provide a number of unique characteristics – such as resistance to high heat, corrosion and wear – making them useful in a multitude of applications. The next time you climb into your automobile take note that you are surrounded by components which are made of refractory metals […]

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How to Produce Silicon Carbide

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Silicon carbide (SiC) is an interesting material that has found application in a variety of industries. The two best known applications of this material are its use as an abrasive material and its more recent use as a wide band gap semiconductor for high power, high temperature electronic devices. The high hardness of this material, […]

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How Do We Use Molybdenum?

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Molybdenum, whose chemical symbol is Mo, was first recognized as an element in 1778. Until at time, the mineral molybdenite—the most important source of molybdenum—was believed be a lead mineral because of its metallic gray color, greasy feel, and softness. In the late 19th century, French metallurgists discovered that molybdenum, when alloyed with steel in […]

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The Role of Niobium in Superalloys

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Refractory elements are important alloying additions in both nickel-base and ironnickel-base superalloys. They are responsible for the increased high temperature mechanical properties present in current superalloy systems. It has long been established that nickel-base and iron-nickel-base superalloys are “super” because they are strengthened by a dispersion of fine and coherent gamma-prime (y) and at times […]

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The Metal that doesn’t Fear Aqua Regia—Tantalum

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Corrosion is the damage or qualitative change of material under the influence of the environment. The corrosion of metal and alloy is mainly caused by chemical or electrochemical damage. Common corrosion-resistant metals are austenitic stainless steel, Hastelloy, Monel alloy, titanium and titanium alloy, platinum, gold, rhodium and other precious metals. Few people know that the […]

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Which Elements Have the Highest Melting Point

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As we all know, melting point is the temperature at which substance converts from solid state to liquid state. Some of the metals show very high melting points at least 2,000 degrees Celsius, and they also have very high physical strength. These metals are named as refractory metals. Niobium, molybdenum, tantalum, tungsten and rhenium are […]

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Which Metals are Nickel Free

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In 1751, Axel Fredrik Cronstedt, working at Stockholm, investigated a new mineral – now called nickeline (NiAs) – which came from a mine at Los, Hälsingland, Sweden. He thought it might contain copper but what he extracted was a new metal which he announced and named nickel in 1754. Many chemists thought it was an […]

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