华中科技大学学报（自然科学版）2025，Vol.53Issue(6)：155-160,6.DOI:10.13245/j.hust.250622
真空烧结(Ti,W)C基金属陶瓷的显微结构及相演变研究
Microstructure and phase evolution mechanism of(Ti,W)C-based cermets during vacuum sintering process
摘要
Abstract
(Ti,W)C-based cermets were prepared by section vacuum sintering,the changes of shrinkage and density of samples during vacuum sintering were recorded and analyzed,and the microstructure and phase evolution of(Ti,W)C-based cermet during sintering process were studied.Results show that with the continuous increase of sintering temperature,the number of pores in the cermets decreases,and the shrinkage and density of the samples increase.During the sintering process,the atoms of each element continuously diffuse and accumulate under the influence of various diffusion mechanisms,forming various microstructures.Meanwhile,the angle and intensity of each X-ray diffraction(XRD)peak also continue to change slightly,or disappear at a certain temperature,indicating that there is a complex phase evolution process during the sintering process.The liquid phase appeares at about 1 260℃,and the densification process of the sintered samples greatly accelerates under the action of various mechanisms such as particle rearrangement,dissolution-re-precipitation,etc.,and a variety of microstructure such as weak white core gray rim,gray core gray rim and gray coreless forms.关键词
粉末冶金/显微结构/无芯结构/(Ti,W)C基金属陶瓷/致密度Key words
powder metallurgy/microstructure/coreless structure/(Ti,W)C-based cermets/density分类
金属材料引用本文复制引用
姚振华,吴炳昆,彭峥,宫立超..真空烧结(Ti,W)C基金属陶瓷的显微结构及相演变研究[J].华中科技大学学报（自然科学版）,2025,53(6):155-160,6.基金项目
国家自然科学基金青年基金资助项目(52001118). （52001118）
