CAJ | 학술논문

采用湿化学法制备W-TiC复合粉体，然后采用放电等离子体烧结(SPS)技术制备超细晶W-TiC复合材料，并对其复合粉体形貌和烧结复合材料组织结构进行研究。结果表明，对原始TiC粉进行活化预处理，使TiC粉表面获得均匀分布的缺陷，提高TiC粉表面的的亲水性，通过化学还原获得第二相TiC颗粒，且均匀弥散分布于W基体晶界和晶粒内。采用SPS烧结技术获得的超细晶W-TiC复合材料晶粒尺寸为400 nm，致密度为95%，维氏显微硬度值HV 0.2达到1280。
채용습화학법제비W-TiC복합분체，연후채용방전등리자체소결(SPS)기술제비초세정W-TiC복합재료，병대기복합분체형모화소결복합재료조직결구진행연구。결과표명，대원시TiC분진행활화예처리，사TiC분표면획득균균분포적결함，제고TiC분표면적적친수성，통과화학환원획득제이상TiC과립，차균균미산분포우W기체정계화정립내。채용SPS소결기술획득적초세정W-TiC복합재료정립척촌위400 nm，치밀도위95%，유씨현미경도치HV 0.2체도1280。
W-TiC composite powders were prepared by wet-chemical process, and ultra-fine grained W-TiC composites were fabricated by spark plasma sintering (SPS). The surface morphologies of W-TiC composite powders and the microstructure of W-TiC composites were studied. The results show that TiC powders are subjected to chemical activation pretreatment to obtain uniform distribution of defects on the surface of TiC powder, thus increasing the hydrophilicity of the TiC surface. The second phase TiC particles are homogeneously and dispersively distribute in the grains and grain boundaries by chemical reduction. The grain size, relative density and the Vicker hardness HV0.2 of the ultra-fine grained W-TiC composites by SPS are 400 nm, 95% and 1280, respectively.