摘要
用熔铸法制备了ＴｉＢ２和ＳｉＣ颗粒增强铝基复合材料，评价了ＴｉＢ２／Ａｌ和ＳｉＣ／Ａｌ复合材料的硬度，研究了增强剂的加入方式和体积分数对ＴｉＢ２／Ａｌ复合材料拉伸性能的影响；并用扫描电镜分析了复合材料的显微组织。结果表明，ＴｉＢ２颗粒对Ａｌ基体的增强效果比ＳｉＣ颗粒好，Ｔｉ，Ｂ化合物的增强效果优于ＴｉＢ２粉末，复合材料的力学性能随ＴｉＢ２体积分数增加而提高；用含Ｔｉ，Ｂ化合物的混合物增强的１．５％ＴｉＢ２／Ａｌ（体积分数）复合材料的热轧退火态性能为σｂ１６０．４ＭＰａ，δ１３．１％，铸态ＨＢ４５１ＭＰａ。ＳＥＭ观察结果表明，在铝基体中添加Ｔｉ、Ｂ化合物的混合物能在基体中原位生成ＴｉＢ２颗粒。
TiB2 and SiC particle reinforced aluminium matrix composites were prepared by casting. The hardness of TiB2p/Al and SiCp/Al composites were evaluated. The effects of addition method and volume fraction of reinforcement on tensile property of TiB2p/Al composites were studied. The microstructrues of the composites were analyzed by SEM.The results indicate that hardening efficiency of TiB2 particle is better than that of SiC particle, the reienforcement efficiency of Ti or B compound is superior to TiB2 powder; the mechanical properties of composites increase with increasing volume fraction of TiB2. The properties of 1.5% TiB2/Al(volume fraction) reinforced using a mixture of Ti and B compound are σb=160.4 MPa, δ=13.1% as hot rolled and annealed and HB=451 MPa as cast, respectively. SEM observation show that the TiB2 particle insitu formed in an aluminium matrix when a mixture of Ti and B compound were added to matrix.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
1998年第2期286-290,共5页
The Chinese Journal of Nonferrous Metals
关键词
颗粒增强
铝基
复合材料
硼化钛
particle reinforcement aluminium matrix composites TiB2
