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本文采用溶胶-凝胶法在较低温度(1 400℃)下制备了Ti(C,N)-Mo2C-Ni金属陶瓷复合粉末。通过红外光谱(FTIR)、X-ray衍射(XRD)、热重分析(TG-DTA),扫描电镜(SEM)、能谱(EDS)、比表面积分析(BET)、氮/氧含量测定等分析检测方法 ,对该粉末的制备过程进行了初步的研究与分析。结果表明:在1 400℃,真空条件下,以钛酸四丁酯为钛源,以蔗糖为碳源,乙二醇为溶剂,采用溶胶-凝胶法结合碳热还原法所制得的Ti(C,N)-Mo2C-Ni金属陶瓷复合粉末晶粒小,纯度较高;其制备机理为:原料通过水解、缩聚、裂解/分解等反应,经过干燥后首先得到TiO2混合先驱体粉末,再经过碳热还原及一系列化学反应最后生成了Ti(C,N)-Mo2C-Ni金属陶瓷复合粉末。
In this paper, Ti (C, N) -Mo2C-Ni cermet composite powders were prepared by sol-gel method at lower temperature (1400 ℃). The samples were characterized by FTIR, XRD, TG-DTA, SEM, EDS, BET, N / O Detection methods, the preparation of the powder conducted a preliminary study and analysis. The results showed that Ti (superscript 2 +) was prepared by sol-gel method and carbothermal reduction method under the condition of 1 400 ℃ and under the conditions of tetrabutyl titanate, sucrose as carbon source and ethylene glycol as solvent. (C, N) -Mo2C-Ni cermet composite powder is small in grain size and high in purity. The preparation method comprises the following steps of: hydrolyzing, polycondensing and cracking / decomposing the raw materials to obtain a TiO2 mixed precursor powder after drying, After the carbothermal reduction and a series of chemical reactions finally produced Ti (C, N) -Mo2C-Ni cermet composite powder.