The development of non-oxide ceramic materials

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The development of non-oxide ceramic materials continues to be an area of intense investigation and
development within the ceramic materials community. Historic compounds such as SiC, B4C and
Si3N4 have more recently been joined by a wide range of carbide, nitride, and boride compounds, as
well as mixed compounds such as the MAX phases (e.g., Ti3SiC2) in these investigations. Product
opportunities ranging from high-temperature electronics, improved personnel and vehicle armor,
improved wear-resistant materials, and extreme environment tolerant materials all drive these efforts.
In order to capitalize on the often excellent properties provided by these materials, it is particularly
important to manufacture the starting materials in a manner that ensures high phase and chemical
purity, as well as non-agglomerated, finely controlled particle sized powders. Historical processes
often involved batch reaction of low-cost, coarse reactants at high temperature for long times,
followed by extensive crushing and milling steps. More advanced processes involve much higher
quality raw materials, improvements in precursor mixing and handling methods, and more controlled
calcining cycles to result in improved product powders.  

Date: 2023-04-10     hits: 378    Return