摘要
将 Ni,Al,Co,Ti,C各元素 ,按 Ni50 Al4 5Co5+10 % Ti C和 Ni50 Al4 5Co5+2 0 % Ti C名义成分配比混合 ,在高能球磨机内进行机械合金化 (MA)。纳米晶粉末经过热压 (HP)和热等静压 (HIP)处理 ,制备出晶粒大小为 80~ 2 5 0 nm原位内生 Ti C颗粒 ,晶粒为 10 0~ 35 0 nm Ni Al (Co)基体的块体复合材料 ,其室温屈服强度达 1394~ 16 6 0 MPa,具有 12 %~ 13%压缩形变。 Ni Al (Co) - 2 0 % Ti C纳米晶复合材料 ,在 70 0℃压缩形变至 30 %时 ,表面光滑没有裂纹 ,在 110 0℃下 ,高温屈服强度为 136 MPa,是铸态纯 Ni Al的
Ni, Al, Co, Ti and C was mixed with Ni 50 Al 45 Co 5+10%TiC and Ni 50 Al 45 Co 5+20%TiC ratio and processed with mechanical alloying in high energy balling After the nano composite powder was treated by hot pressing (HP) and hot isostatically pressing (HIP), the bulk nano composite with the gain from 100~350nm and embedded TiC nano paritcles from 80~250nm was obtained At room temperature, the yield strength and compressibility was 1394~1660MPa and 12%~13%, respectively The surface of NiAl(Co) 20TiC nano composite with 30% compressibility was smooth without crack in 700℃ In 1100℃, the yield strength of bulk nano material was 136MPa, which was 4 times than that of the cast NiAl
出处
《材料工程》
EI
CAS
CSCD
北大核心
2002年第3期14-16,共3页
Journal of Materials Engineering
基金
国家重大基金资助项目 (5 9895 15 2 )
"八六三"计划资助项目 (715 -0 0 5 -0 0 3 0 )