摘要
B4C－ 20vol％ Al2O3和 B4C－ 30vol％ Al2O3两种材料分别掺加了 15vol％ (体积比 )的 SiC晶须 (SiCw)在 1850℃、 35MPa下热压烧结 40min。结果表明： SiCw的掺入，使复合材料的力学性能下降，特别是 B4C－ 30vol％ Al2O3材料的性能下降更为明显，弯曲强度和断裂韧性由原先的 389.5MPa和 5.76MPa· m1/2，分别下降到 293.4MPa和 4.11MPa· m1/2。通过分析找出了 SiCw对复合材料性能产生影响的原因。
vol％ of SiC Whisker was added to B4C－ 20％ Al2O3 and B4C－ 30％ Al2O3 composites respectively, and sintered at vacuum atmosphere at 1850℃、 35MPa for 40 min. The results show that doped－ SiC whisker decreased the properties of B4C－ Al2O3 composites. B4C－ 30％ Al2O3 composite properties dropped more obviously, the bending strength and fracture toughness were dropped from 389.5 MPa and 5.76 MPa· m1/2 to 293.4 MPa and 4.11MPa· m1/2, respectively. Through analysis the reasons of SiC whisker's influence on the properties of B4C－ Al2O3 composites are found.
出处
《哈尔滨建筑大学学报》
EI
2000年第4期66-69,共4页
Journal of Harbin University of Civil Engineering and Architecture
关键词
碳化硅SiC
晶须
B4C/Al2O3复合材料
陶瓷
SiC whisker
B4C－ Al2O3 composites
bending strength
fracture toughness
influence
reasons
