Very High Temperature Fibers of Vanadium Carbide and Niobium Carbide

对复合材料的强度和耐温性的要求越来越高，这将需要在成分和制造方面采用创新的方法。由单晶晶须组成的复合材料显示出良好的抗拉强度，但已被证明难以生长并且尚未生产出有用的长度。LaserGenics公司提出用激光加热支架生长技术来研究VC和NbC单晶光纤的生长。这些材料的纤维将被生长，它们的形态特征，x射线衍射和强度测量在第一阶段的努力。这些高熔点材料的几米长度的单晶纤维将成为第一阶段项目的基础。将纤维制成复合材料，并测定纤维对强度的影响。

Increasing demands on the strength and temperature tolerance for composite materials will require innovative approaches in composition and fabrication. Composite materials composed of single crystal whiskers show promising tensile strength but have proven difficult to grow and have not been produced in useful lengths. LaserGenics Corporation is proposing to investigate the growth of single crystal fibers of VC and NbC by the laser- heated pedestal-growth technique. Fibers of these materials will be grown, their morphology characterized, x- ray diffraction and strength measurements made during the Phase I effort. Single crystal fibers of multi-metre lengths of these very high melting point materials will be the basis of a Phase I program. Composite materials incorporating the fibers will be made, the effect the fibers have on strength will be determined.