SiC纤维/LAS玻璃陶瓷的热压工艺研究

STUDY ON HOT-PRESSING PROCESSING OF SiC FIBER/LAS GLASS-CERAMIC COMPOSITE

研究了Nicalon SiC纤维/LAS玻璃陶瓷复合材料的热压工艺。经探索试验后,进行了热压温度、时间、压力及在950℃析晶处理时间四因素三水平L_s(3~4)正交实验。分析了这些因素对复合材料密度、强度、韧性及从复合材料中萃取出来的纤维强度的影响,获得了最佳工艺参数及强度、韧性分别为612MPa及15MPa·m^(1/2)的Nicalon SiC纤维/LAS玻璃陶瓷复合材料。

Hot-presslng process of Nicalon SiC/LAS glass-ceramic composite is studied. After tests, four factors, i.e., hot-pressing temperature, time, pressure and heat treatment time at 950℃, and three levels are selected for the orthogonal-design experiment L_9(3~4). The effects of these factors on the composite density, strength, toughness and the. strength of fiber extracted from composite are analysed with SEM, TEM. The optimal process parameters and a high quality Nicalon SiC fiber/LAS glass-ceramic composite with high strength (612MPa)and toughness(15MPa·m1/2)are obtained.