Novelty phase synthesis mechanism and morphology in resin-bonded Al–Al2O3–TiO2 composites at high temperatures under flowing N2

论文摘要

An Al–AlN core–shell structure is beneficial to the performance of Al–Al2O3 composites. In this paper, the phase evolution and microstructure of Al–Al2O3–TiO2 composites at high temperatures in flowing N2 were investigated after the Al–AlN core–shell structure was created at 853 K for 8 h. The results show that TiO2 can convert Al into Al3Ti（～1685 K）, which reduces the content of metal Al and rearranges the structure of the composite. Under N2 conditions, Al3Ti is further transformed into a novelty non-oxide phase, TiCN. The transformation process can be expressed as follows: Al3Ti reacts with C and other carbides（Al4C3 and Al4O4C） to form TiCx（x < 1）. As the firing temperature increases, Al3Ti transforms into a liquid phase and produces Ti（g） and TiO（g）. Finally, Ti（g） and TiO（g） are nitrided and solid-dissolved into the TiCx crystals to form a TiCN solid solution.

论文目录

• 1.Introduction
• 2.Theoretical analysis
• 3.Experimental process
• 4.Results and discussion
•   4.1.Analysis of the phase and microstructure of the specimen heated at 1573 K
•   4.2.Analysis of the phase and microstructure of the specimen heated at 1773 K
• 4.3.Phase evolution process analysis
• 5.Conclusions

文章来源

类型: 期刊论文

作者: Yang Sun,Yong Li,Li-xin Zhang,Shi-ming Li,Ming-wei Yan,Jia-lin Sun

来源: International Journal of Minerals Metallurgy and Materials 2019年09期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 材料科学

单位: School of Materials Science and Engineering, University of Science and Technology Beijing,Sinosteel Refractory Co.Ltd.

基金: financial support from the National Natural Science Foundation of China (No. 51872023)

分类号: TB33

页码: 1177-1185

总页数: 9

文件大小: 3175K

下载量: 19