摘要
采用反应热压烧结法制备了Ti3SiC2/SiC复合材料,针对SiC含量对该复合材料致密化程度、力学性能以及应力-应变行为的影响进行了研究。结果表明:(1)随着SiC含量的增加,试样难于致密,试样需要在更高的温度才能达到较高的致密度;(2)随SiC含量的增加,Ti3SiC2/SiC复合材料弯曲强度和断裂韧性提高,但SiC含量达到50%时,由于复合材料含有较多的孔洞,使强度和断裂韧性降低;(3)Ti3SiC2/SiC复合材料在常温下表现为非脆性断裂。
Ti3SiC2/SiC composites were fabricated by reactive hot pressing method. Effect of the content of SiC on the densifieation, mechanical properties and the behavior of stress-strain of the composites were investigated. The results showed that： （ 1 ） It became more difficult for the composites to densify when the content of SiC in composites was increased. It need be sintered at higher temperature to get denser composite ; （2） The flexural strength and fracture toughness of composites increases when the content of SiC added in composites was increased. However, when the content of SiC reached 50% the flexural strength and fracture toughness of composites decreased due to high content of pore in composites; （3） Ti3 SiC2/SiC composites were non-brittle at room temperature.
出处
《航空材料学报》
EI
CAS
CSCD
2008年第6期78-81,共4页
Journal of Aeronautical Materials
基金
陕西省教育厅专项基金(01JK174)
