摘要
将常规熔铸工艺与快速凝固技术相结合,成功地制备出Al-TiC自生复合材料.常规熔铸Al-TiC自生复合材料中TiC的体积分数为14.5%,颗粒尺寸为0.2-1.0μm,一般呈聚集态分布;与类似工艺条件下的人工复合材料相比,业已表现出较好的综合力学性能.快凝及热挤成型以后,TiC的体积分数约为13.5%,颗粒尺寸减至40-80nm,并弥散分布于晶粒尺寸为0.30-0.80μm的α-Al基体上,室温拉伸强度增加了约100MPa,表现出良好的高温力学性能.
Combining the advantages of ingot metallurgy,rapid solidification technology and in situ processed composites,a kind of innovative in situ Al-TiC composite has been successfully made with a series of research on its microstructure and properties.The ingot metallurgy microstructures exhibited that the accumulated TiC particulate phase with a volume fraction of 14.5% and sizes of 0.2-1.0μm segregated generally at the α-Al grain boundaries.After rapid solidification and thermal extrussion,the microstructures comprise uniform fine-scale dispersions of TiC phase particles(the volume fraction slightly reduced as 13.5%) with sizes of 40-80 nm in a supersaturated α-Al matrix of 0.30-0.80 μm grain sizes.The rapidly solidified in situ Al-TiC composite exhibited high Young's modulus and substantial improvements in room and elevated temperature tensile properties.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第10期1111-1115,共5页
Acta Metallurgica Sinica
基金
国家"863计划"资助