Abstract:Ultra鄄high temperature ceramics (UHTCs) are regarded as the most promising thermal protective ma鄄
terials for the nose and leading edge of hypersonic or re鄄entry vehicles due to their stability of physical and chemical
properties in extreme environment. The progress on UHTCs is reviewed in detail, including powder synthesis, densifi鄄
cation and mechanical properties. Also, some problems exist in the material studies are preliminarily summarized. It
is expected that this review will provide some guidance for stimulating further research and practical applications of the
UHTCs.