Search results
Results from the WOW.Com Content Network
The first cemented carbide developed was tungsten carbide (introduced in 1927) which uses tungsten carbide particles held together by a cobalt metal binder. Since then, other cemented carbides have been developed, such as titanium carbide, which is better suited for cutting steel, and tantalum carbide, which is tougher than tungsten carbide. [1]
The material is usually called cemented carbide, solid carbide, hardmetal or tungsten-carbide cobalt. It is a metal matrix composite, where tungsten carbide particles are the aggregate, and metallic cobalt serves as the matrix. [30] [31] It has been found wear and oxidation properties of cemented carbide can be improved by replacing cobalt with ...
Cementite (or iron carbide) is a compound of iron and carbon, more precisely an intermediate transition metal carbide with the formula Fe 3 C. By weight, it is 6.67% carbon and 93.3% iron. By weight, it is 6.67% carbon and 93.3% iron.
Alkali metals, alkaline earth metals, and lanthanoid metals form acetylides, for example, sodium carbide Na 2 C 2, calcium carbide CaC 2, and LaC 2. [2] Lanthanides also form carbides (sesquicarbides, see below) with formula M 2 C 3. Metals from group 11 also tend to form acetylides, such as copper(I) acetylide and silver acetylide.
A cermet can combine attractive 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. The metal is used as a binder for an oxide, boride, or carbide. Generally, the metallic elements used are nickel, molybdenum, and cobalt.
The benefits of this method were proved for the sintering of refractory metals as well as conductive carbide or nitride powders. The starting boron – carbon or silicon –carbon powders were placed in an electrically insulating tube and compressed by two rods which also served as electrodes for the current.
A metal carbido complex is a coordination complex that contains a carbon atom as a ligand. They are analogous to metal nitrido complexes . Carbido complexes are a molecular subclass of carbides , which are prevalent in organometallic and inorganic chemistry.
Maxamet [56] is marketed by its manufacturer as a middle-ground between high-speed steel and cemented carbide. Carpenter claims Maxamet has improved hardness and wear resistance over high-speed steels while being tougher than cemented carbides. As of early 2018, it is used in several production knives from Spyderco.