Microstructure, Densification, Microhardness and Antioxidant Properties of Ti2AlN/TiN FGM Fabricated by Hot-pressing

作者：Chen Yanlin; Li Zongyu; Tang Jun; Zeng Chengwen; Gao Wei; Xiong Yan; Yan Ming^*

来源：Journal of Wuhan University of Technology-Materials Science Edition, 2014, 29(6): 1173-1177.

DOI：10.1007/s11595-014-1062-9

• Ti2AlN
• TiN
• functionally graded material (FGM)

Ti2AlN/TiN functionally graded materials (FGM) were successfully fabricated by vacuum hotpressing. Bulk density of the sintered samples was measured by Archimedes principle. The sample sintered at 1 300 degrees C for 2 h has the maximum fi nal density and lowest open porosity. SEM coupled with EDS was utilized to investigate the phase composition and microstructure, and well-formed boundary was found between the layers. The microhardness tests suggest that Vickers' hardness of Ti-2 AlN/TiN FGM increases monotonically with the volume fraction content of TiN increases. Corrosion results are that the corrosion resistance of Ti2AlN/ TiN FGM is much better than that of Ti2AlN in acid, but quite the opposite in alkali. Constant temperature oxidation study shows that the oxidation kinetics of Ti2AlN/TiN FGM at 900 degrees C follows the parabolic law closely.

• 出版日期2014-12
• 单位湖北工业大学