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Tantalum Carbide

 
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Tantalum carbide (Ta
Tantalum

Tantalum is a chemical element with the symbol Ta and atomic number 73. A rare, hard, blue-grey, lustre transition metal, tantalum is highly corrosion-resistant and occurs naturally in the mineral tantalite, always together with the chemically similar niobium....
C
Carbon

Carbon is a chemical element with chemical symbol C and atomic number 6. As a member of group 14 on the periodic table, it is nonmetallic and tetravalence?making four electrons available to form covalent bond chemical bonds....
) is an extremely hard (Mohs hardess
Mohs scale of mineral hardness

Not to be confused with Siemens_#Mho, a unit of electric conductance.The Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material....
 9-10) refractory
Refraction (metallurgy)

In metallurgy, refraction is a property of metals that indicates their ability to withstand heat. Metals with a high degree of refraction are referred to as refractory....
 ceramic
Ceramic

File:Bridge from dental porcelain.jpgFile:Qing vase p1070256.jpgA ceramic is an inorganic, nonmetal solid prepared by the action of heat and subsequent cooling....
 material, commercially used in tool bit
Tool bit

The term tool bit generally refers to a non-rotary cutting tool used in Lathe , shapers, and Planer . Such cutters are also often referred to by the set-phrase name of single-point cutting tool....
s for cutting tools. The hardness even exceeds that of diamond
Diamond

In mineralogy, diamond is the Allotropes of carbon where the carbon atoms are arranged in an isometric-hexoctahedral crystal lattice. After graphite, diamond is the second most stable form of carbon....
 . It is a heavy, brown powder usually processed by sintering
Sintering

Sintering is a method for making objects from Powder , by heating the material below its melting point until its particles adhesion to each other....
, and an important cermet
Cermet

A cermet is a composite material composed of ceramic and metallic materials. A cermet is ideally designed to have the optimal properties of both a ceramic, such as high temperature resistance and hardness, and those of a metal, such as the ability to undergo plastic deformation....
 material. It is sometimes used as a fine-crystalline additive to tungsten carbide
Tungsten carbide

Tungsten carbide, WC, or tungsten semicarbide, W2C, is a chemical compound containing tungsten and carbon, similar to titanium carbide....
 alloys. Tantalum carbide has the distinction of being the stoichiometric binary compound with the highest known melting point, at 4150 K (3880°C) .






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Tantalum carbide (Ta
Tantalum

Tantalum is a chemical element with the symbol Ta and atomic number 73. A rare, hard, blue-grey, lustre transition metal, tantalum is highly corrosion-resistant and occurs naturally in the mineral tantalite, always together with the chemically similar niobium....
C
Carbon

Carbon is a chemical element with chemical symbol C and atomic number 6. As a member of group 14 on the periodic table, it is nonmetallic and tetravalence?making four electrons available to form covalent bond chemical bonds....
) is an extremely hard (Mohs hardess
Mohs scale of mineral hardness

Not to be confused with Siemens_#Mho, a unit of electric conductance.The Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material....
 9-10) refractory
Refraction (metallurgy)

In metallurgy, refraction is a property of metals that indicates their ability to withstand heat. Metals with a high degree of refraction are referred to as refractory....
 ceramic
Ceramic

File:Bridge from dental porcelain.jpgFile:Qing vase p1070256.jpgA ceramic is an inorganic, nonmetal solid prepared by the action of heat and subsequent cooling....
 material, commercially used in tool bit
Tool bit

The term tool bit generally refers to a non-rotary cutting tool used in Lathe , shapers, and Planer . Such cutters are also often referred to by the set-phrase name of single-point cutting tool....
s for cutting tools. The hardness even exceeds that of diamond
Diamond

In mineralogy, diamond is the Allotropes of carbon where the carbon atoms are arranged in an isometric-hexoctahedral crystal lattice. After graphite, diamond is the second most stable form of carbon....
 . It is a heavy, brown powder usually processed by sintering
Sintering

Sintering is a method for making objects from Powder , by heating the material below its melting point until its particles adhesion to each other....
, and an important cermet
Cermet

A cermet is a composite material composed of ceramic and metallic materials. A cermet is ideally designed to have the optimal properties of both a ceramic, such as high temperature resistance and hardness, and those of a metal, such as the ability to undergo plastic deformation....
 material. It is sometimes used as a fine-crystalline additive to tungsten carbide
Tungsten carbide

Tungsten carbide, WC, or tungsten semicarbide, W2C, is a chemical compound containing tungsten and carbon, similar to titanium carbide....
 alloys. Tantalum carbide has the distinction of being the stoichiometric binary compound with the highest known melting point, at 4150 K (3880°C) . The substoichiometric compound TaC0.89 has a higher melting point, near 4270 K (4000°C).

When used as a mould
Molding (process)

Molding or moulding is the process of manufacturing by shaping pliable raw material using a rigid frame or model called a pattern....
 coating, it produces a low friction
Friction

File:Friction alt.svgFriction is the force resisting the relative lateral motion of solid surfaces, fluid layers, or material elements in contact....
 surface.

Tantalum carbide-graphite
Graphite

The mineral graphite is one of the allotropes of carbon. It was named by Abraham Gottlob Werner in 1789 from the Greek language ??afe?? : "to draw/write", for its use in pencils, where it is commonly called lead, as distinguished from the actual metallic element lead....
 composite material
Composite material

Composite materials are engineered materials made from two or more constituent materials with significantly different physical or chemical properties which remain separate and distinct on a macroscopic level within the finished structure....
, developed in Los Alamos National Laboratory
Los Alamos National Laboratory

Los Alamos National Laboratory is a United States Department of Energy United States Department of Energy National Labs, managed and operated by Los Alamos National Security, LLC , located in Los Alamos, New Mexico....
, is one of the hardest materials ever synthesized.

Dusts from grinding can be flammable.

Substances to avoid are: flammable gases (dust may form explosive mixtures with gases)

See also

  • niobium carbide
    Niobium carbide

    Niobium carbide is an extremely hardness refraction ceramic material, commercially used in tool bits for cutting tools. It is usually processed by sintering and is a frequent additive in cementation carbides....
    .