The Development of a High Temperature Stable Silicon CarbideFiber

这是第二阶段小企业研究计划拨款，以继续第一阶段拨款期间取得的进展。在第一阶段，证明了一种碳化硅纤维的生产，其抗拉强度为每平方英寸30万磅，弹性模量为每平方英寸5800万磅，在1200摄氏度的温度下暴露三小时后几乎没有性能退化。第二阶段项目旨在优化纤维的加工，以达到每平方英寸超过50万磅的强度，每平方英寸6000万磅的弹性模量，并具有类似的热稳定性。碳化硅纤维用于陶瓷。和金属。基复合材料。这些材料用于热机。目前的研究目标是提高纤维的耐高温性能。这种纤维的发展将使美国不再需要进口碳化硅纤维，并将提供出口碳化硅纤维的机会。

This is a Phase II Small Business Research Initiative grant to continue the progress achieved during the Phase I grant. During Phase I, it was demonstrated that a silicon carbide fiber was produced which exhibited tensile strength of three hundred thousand pounds per square inch, an elastic modulus of fifty eight million pounds per square inch, virtually no degradation of properties after exposure to temperatures of twelve hundred degrees centigrade for three hours. The Phase II program seeks to optimize the processing of the fiber to achieve strength in excess of five hundred thousand pounds per square inch, elastic modulus of sixty million pounds per square inch, with similar thermal stability. Fibers of silicon carbide are used in ceramic. and metal. matrix composites. These materials are used in heat engines. The current research is aimed at improving the resistance of the fibers to high temperatures. The development of this fiber will obviate the need for the United States to import silicon carbide fibers, and will provide an opportunity to export them.