Si-B-(N,C) a new ceramic material for high performance applications
Si-B-(N,C) a new ceramic material for high performance applications
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发表时间：
1995-12
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通讯作者：
H. Baldus;G. Passing;D. Sporn;A. Thieraf
中科院分区：
文献类型：
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作者：
H. Baldus;G. Passing;D. Sporn;A. Thieraf
研制了一种性能优异的多元单相碳氮陶瓷。{open_quotes}单源{close_quotes}前体Cl{sub 3}Si-NH-BCl{sub 2}与烷基胺反应形成陶瓷前体聚合物，根据反应条件，该陶瓷前体聚合物可以是液体或可熔或不可熔的固体。聚合物在氨气或氮气中热解分别得到非晶Si{sub 3}B{sub 3}N{sub 7}和SiBN{sub 3}C陶瓷。本文报道了SiBN{sub 3}C陶瓷的物理和化学性能，着重介绍了其优异的抗氧化性能。高达1800摄氏度的抗结晶性使得能够开发出显著改进的高性能无机纤维。
A new multinary, single phase (carbo-)nitride ceramic with outstanding properties has been developed. The {open_quotes}single-source{close_quotes} precursor Cl{sub 3}Si-NH-BCl{sub 2} reacts with alkylamines to form a preceramic polymer which can be a liquid or a fusible or infusible solid depending on reaction conditions. Polymer pyrolysis in ammonia or nitrogen leads to amorphous Si{sub 3}B{sub 3}N{sub 7} and SiBN{sub 3}C ceramics, respectively. The present paper reports on the physical and chemical properties of SiBN{sub 3}C ceramics, with emphasis on its outstanding oxidation resistance. The resistance towards crystallization up to 1800{degrees}C enables the development of considerably improved high-performance inorganic fibers.