烧结工艺对Ti(C,N)基金属陶瓷性能的影响Effect of sintering process on properties of Ti(C,N) cermets
陈平,张厚安,唐思文,张欣
摘要(Abstract)：
采用粉末冶金法制备Ti(C,N)基金属陶瓷,利用金相图像分析系统和扫描电镜观察陶瓷表面孔洞和微观组织形貌,分析了热处理和烧结气氛工艺对不同碳氮比的Ti(C,N)基金属陶瓷性能的影响。结果表明:真空烧结后的热处理工艺可使Ti(C,N)基金属陶瓷的横向断裂强度提高10%以上,硬度也有不同程度的提高,其中Ti(C0.5N0.5)基金属陶瓷适合采用低压工艺处理,Ti(C0.7N0.3)基金属陶瓷适合采用热等静压工艺处理。氮气气氛烧结中,Ti(C0.5N0.5)基金属陶瓷在氮分压值为2kPa时的横向断裂强度达到最大值,而硬度变化不明显,这可归因于合适的氮分压阻碍了金属陶瓷内氮化物的分解,提高了材料的致密度,细化了晶粒组织。
关键词(KeyWords)： Ti(C,N);热处理;烧结气氛;性能
基金项目(Foundation): 国家自然科学基金(50405041);; 企业委托攻关项目(D10308)
作者(Author): 陈平,张厚安,唐思文,张欣
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