摘要
采用放电等离子烧结方法研究了Ti3AlC2/TiB2复合材料的制备和不同TiB2含量(体积百分数)对Ti3AlC2/TiB2性能的影响。研究表明,在1250℃,30MPa压力和保温8min条件下烧结,可以得到相对密度达98%以上的致密Ti3AlC2/TiB2块体材料;在Ti3AlC2中添加TiB2能大幅度提高材料的硬度;Ti3AlC2/30%TiB2维氏硬度达到10.39GPa,电导率达到3.7×106S·m-1;当TiB2含量为10%时,抗弯强度为696MPa,断裂韧性为6.6MPa·m1/2,但当TiB2含量继续增加时,由于TiB2的团聚和TiB2抑制Ti3AlC2晶体的生长导致了材料的抗弯强度和断裂韧性的下降。
The synthesis of Ti3AlC2/TiB2 composites was studied by spark plasma sintering with different volume content of TiB2. Results indicated the bulk Ti3AlC2/TiB2 was fabricated by SPS, which soaked for 8 min under a pressure of 30 MPa at 1 250℃. The hardness of composites was great increased with the addition of TiB2; The Vicker＇s hardness and electric conductivity of Ti3AlC2/30%TiB2 were 10.39 GPa and 3.7×10^6 S·m^-1; The flexural strength and fracture toughness reached maximum value, which were 696 MPa and 6.6 MPa·m^1/2 when the volume content of TiB2 was 10%. But when the volume content of TiB2 was higher than 10%, slight decreased in flexural strength and fracture toughness were observed, as result of agglomeration of TiB2.
出处
《稀有金属快报》
CSCD
2007年第2期23-27,共5页
Rare Metals Letters
基金
国家自然科学基金资助项目(50572080)
