Li Yefei, Li Cong, Tang Shuli, Zheng Qiaoling, Wang Juan, Zhang Zhibo, Wang Zhicheng
State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China.
Xi'an Microelectronic Technology Institute, Xi'an 710054, China.
Materials (Basel). 2019 Nov 6;12(22):3646. doi: 10.3390/ma12223646.
Using zirconia toughened alumina (ZTA) particles and Ni-Ti complex powders as raw materials, high-Cr cast iron reinforced by ZTA particles was prepared by an infiltration casting process. A continuous transition layer formed at the interface between ZTA particles and the Cr15 matrix, which proves that there is strong metallurgical interfacial bonding at the interface. The phases in the Ni-Ti layer of the ZTA/Fe composite were preserved compared with the microstructure of sintered ZTA ceramic preform. The hardness of the NiTi, TiO and AlNiTi phases in the interfacial transition layer was measured by the nano-indentation method, which is 12.5 GPa, 16.1 GPa and 9.2 GPa, respectively. The three-body wear resistance of the composite reached 12.6 times that of high-Cr cast iron.
以氧化锆增韧氧化铝（ZTA）颗粒和镍钛复合粉末为原料，采用浸渗铸造工艺制备了ZTA颗粒增强高铬铸铁。ZTA颗粒与Cr15基体界面处形成了连续的过渡层，这证明界面处存在强冶金界面结合。与烧结ZTA陶瓷预制件的微观结构相比，ZTA/Fe复合材料Ni-Ti层中的相得以保留。采用纳米压痕法测量了界面过渡层中NiTi、TiO和AlNiTi相的硬度，分别为12.5GPa、16.1GPa和9.2GPa。该复合材料的三体耐磨性达到高铬铸铁的12.6倍。
