Carbide Types
– Group 4, 5, and 6 transition metals (excluding chromium) have interstitial carbides.
– Titanium carbide and tungsten carbide are important industrially and used for coating metals in cutting tools.
– Carbides can be classified as salt-like (ionic), covalent compounds, interstitial compounds, and intermediate transition metal carbides.
– Examples of carbides include calcium carbide, silicon carbide, tungsten carbide, and cementite.
– Ionic carbides are composed of highly electropositive elements.
– Covalent carbides include silicon carbide and boron carbide.
– Intermediate transition metal carbides have transition metals bonded to carbon.
– Salt-like carbides are composed of highly electropositive elements.
– Covalent carbides have a variety of industrial applications.
Properties of Carbides
– Carbides have high melting points.
– They are generally hard and have high wear resistance.
– Many carbides are chemically inert.
– Some carbides exhibit electrical conductivity.
– Carbides can be used as cutting tools and in high-temperature applications.
Applications of Carbides
– Carbides are used in the production of cemented carbide or hard metal.
– They are used as cutting tools in machining and metalworking industries.
– Carbides are used in wear-resistant coatings for tools and equipment.
– They are used in the production of high-strength ceramics.
– Carbides are used in the automotive and aerospace industries for various applications.
Synthesis of Carbides
– Carbides can be synthesized through various methods, including chemical vapor deposition.
– High temperatures and controlled environments are often required for carbide synthesis.
– Precursor materials, such as metal powders and carbon sources, are used in the synthesis process.
– Different catalysts and reaction conditions can influence the synthesis of carbides.
– Synthesis methods for specific carbides may vary depending on the desired properties.
Carbide Reactions
– Carbides can react with water, leading to the production of gases and hydroxides.
– Some carbides can react with acids, releasing carbon dioxide and other byproducts.
– Carbides may undergo oxidation reactions in the presence of oxygen.
– Certain carbides can react with halogens, forming halides.
– Reactions of carbides can be influenced by temperature, pressure, and the nature of the reactants. Source: https://en.wikipedia.org/wiki/Carbide
In chemistry, a carbide usually describes a compound composed of carbon and a metal. In metallurgy, carbiding or carburizing is the process for producing carbide coatings on a metal piece.
