Ultra high temperature ceramic materials for the future
Release time:
2024-10-10
Ultrahigh Temperature Ceramics (UHTCs for short) was first developed by the U.S. Air Force. It mainly refers to a special material that can maintain chemical stability in high temperature environment (above 2000 ℃) and reaction atmosphere (such as atomic oxygen environment), usually including some high melting point transition metal compounds such as boride, carbide and oxide, The multi-component composite ceramic materials composed of the above compounds are collectively referred to as ultra-high temperature ceramic materials. Among these high melting point transition metal compounds, the melting point of TaC, ZrB2, HfB2, HfC, etc. exceeds 3000 ℃, which makes them have great application potential under extreme high temperature conditions.
Ultrahigh Temperature Ceramics (UHTCs for short) was first developed by the U.S. Air Force. It mainly refers to a special material that can maintain chemical stability in high temperature environment (above 2000 ℃) and reaction atmosphere (such as atomic oxygen environment), usually including some high melting point transition metal compounds such as boride, carbide and oxide, The multi-component composite ceramic materials composed of the above compounds are collectively referred to as ultra-high temperature ceramic materials. Among these high melting point transition metal compounds, the melting point of TaC, ZrB2, HfB2, HfC, etc. exceeds 3000 ℃, which makes them have great application potential under extreme high temperature conditions.
Ultra high temperature ceramic materials such as ZrB2 and HfB2 were initially studied as nuclear reactor materials. In the 1960s, the relevant work of ManLabs in the United States showed that these materials had great application potential in nose cone and tip leading edge. In the 1990s, the United States implemented the SHARP program, and used Militia III to carry and assess three ultra-high temperature ceramic materials: HfB2/SiC, ZrB2/SiC, and ZrB2/SiC/C. Cracks were found after the material was recycled. After analysis, it was considered that the particle agglomeration defect in the material was an important phenomenon leading to cracks. This flight test also proved once again that ultra-high temperature ceramic materials had great potential in extreme high temperature environments.
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