摘要
以钛粉为钛源,淀粉为碳源,利用碳氮化法合成制备TiN/TiCN复合粉体。通过X射线衍射、X射线光电子能谱、扫描电子显微镜和透射电子显微镜等测试方法,研究了合成温度对产物物相和化学键组成的影响,观察了复合粉体的显微结构,并采用热重法分析了产物的抗氧化性。结果表明,随着碳氮化温度由1350℃升高至1500℃,中间产物TiO2、Ti3O5和TiO0.34N0.74逐渐减少。衍射峰向高角度偏移说明TiN/TiCN复合粉体中TiN的比例逐渐增大。在1500℃合成的TiN/TiCN复合粉末初始氧化温度为570℃,高于TiC和TiN粉末初始氧化温度。
TiN/TiCN composite powders were prepared through carbonitridization with titanium and starch powders.The effects of temperature on the phase and chemical bond compositions of the products were studied by using X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS).The microstructure of the composite powders was observed by using scanning electron microscope(SEM)and transmission electron microscope(TEM).Oxidation resistance of the products was analyzed by using thermo-gravimetric instrument.It is showed that the contents of intermediate products(TiO2,Ti3O5 and TiO0.34N0.74)were gradually decreased as the temperature was increased from 1350℃to 1500℃.The shift of the diffraction peak to high angle indicated that the proportion of TiN in the TiN/TiCN composite powders was increased gradually.The initial oxidation temperature of the TiN/TiCN composite powders synthesized at 1500℃was 570℃,which was higher than those of TiC and TiN powders.
作者
张聪
员文杰
ZHANG Cong;YUAN Wenjie(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China)
出处
《陶瓷学报》
CAS
北大核心
2020年第3期403-408,共6页
Journal of Ceramics
基金
湖北省中央引导地方科技发展专项(2019ZYYD076)。
