摘要
以Mo粉、Ni粉、B粉、C粉、W粉为原料,用冷压成型法及真空液相烧结法制成MO2NiB2金属陶瓷,研究不同W含量对MO2NiB2金属陶瓷组织与性能的影响。结果表明:掺杂W的MO2NiB2金属陶瓷在1000℃、120h氧化时,属于完全抗氧化级,表面氧化物层的主晶相是Ni2O3和具有尖晶石结构的NiW2O4,随着W含量的增加,MO2NiB2金属陶瓷的硬度逐渐增加,但其弯曲强度与断裂韧性则不断降低。
MO2NiB2 cermet was prepared by cold pressing and vacuum liquid sintering with Mo powder,Ni powder,B powder,C powder and W powder as raw materials.The effects on the microstructure and properties of MO2NiB2 cermet with different W contents were studied.The results show that MO2NiB2 cermet belong to perfect oxidation resistance level which were oxidized at 1000℃for 120 h.The main crystalline phase of oxide on surface is Ni2O3 and NiW 2O 4(spinel structure).The hardness of MO2NiB2 cermet increases gradually,but its bending strength and fracture toughness decrease.
作者
李文虎
张良
艾桃桃
周佩德
LI Wen-hu;ZHANG Liang;AI Tao-tao;ZHOU Pei-de(School of Material Science and Engineering,Shaanxi University of Technology,Hanzhong 723000,China)
出处
《人工晶体学报》
EI
CAS
北大核心
2019年第6期1089-1093,共5页
Journal of Synthetic Crystals
基金
国家自然科学基金(51602186)
