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New Type of Sintered SiC Fiber and Its Composite Material

机译：新型烧结SiC纤维及其复合材料

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High-temperature stability of SiC-based ceramics has been well-known, and therefore its composite materials have been investigated for the application to thermostructural materials. However, well-known SiC-based fibers and matrix- materials stained with salt are easily oxidized at high temperatures in air. This would be serious problem when these materials are used near the ocean or in a combustion gas containing alkali elements. We have developed a new type of sintered SiC fiber with prominent alkali resistance. This fiber also shows highstrength, high-modulus, excellenl high- temperature stability and superior creep resistance. Moreover, this fiber indicated very high thermal conductivily about 20-fold larger than ordinary SiC based fibers. Furthermore, we also have developed a new type of sintered SiC fiber- bonded ceramics using an intermediate fiber for preparing above mentioned fiber. This composite material maintained initial strength up to 1600 deg C, and what is more, showed very high fracture energy and thermal conductivity.
机译：SiC基陶瓷的高温稳定性是众所周知的，因此已经对其复合材料进行了研究以用于热结构材料。但是，众所周知的SiC基纤维和盐渍的基质材料在高温下容易在空气中氧化。当这些材料在海洋附近或在含碱元素的燃烧气体中使用时，这将是一个严重的问题。我们开发了一种新型的具有出色耐碱性的SiC烧结纤维。这种纤维还显示出高强度，高模量，出色的高温稳定性和优异的抗蠕变性。而且，该纤维显示出非常高的导热性，比普通的SiC基纤维大20倍。此外，我们还开发了一种使用中间纤维制备新型SiC纤维烧结陶瓷的方法。这种复合材料保持了高达1600℃的初始强度，而且还显示出非常高的断裂能和热导率。

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