Analytical and microstructural approach to the study of …
1/8/2016· Crucible steels are known for their carbon content often greater than 0.8% (hypereutectoid steel). With this composition, iron carbide which does not represent the most stable state of equilibrium in the system forms in the microstructure of the alloy .
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Several mechanisms have been defined for the production of silicon carbide (SiC) using the reaction of silica (SiO 2) and carbon (C) at high temperatures. 1 –9 Among these mechanisms, some cases have been widely accepted in the temperature range of 1500 to 2000 K. 7 –9 Nevertheless, attending to the complexity of this reaction, there is no complete investigation for obtaining this
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The graphite crucible, which provides a container for the solvent and a carbon source, is directly heated by induction. Growth, typically at 2000°C, is conducted under atmospheric pressure in a mixture of helium and nitrogen gases.
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Crucible steel is steel made by melting pig iron (cast iron), iron, and sometimes steel, often along with sand, glass, ashes, and other fluxes, in a crucible. In ancient times steel and iron were impossible to melt using charcoal or coal fires, which could not produce temperatures high enough. However, pig iron, having a higher carbon content
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