Effects of Al2O3@Ni core-shell powders on the microstructure and mechanical properties of Ti(C,N) cermets via spark plasma sintering

被引：7
作者：
Zhu, Xulu [1 ]
Liu, Wenjie [1 ]
Yi, Chenyang [1 ]
Zheng, Kai [3 ]
Yi, Mingdong [1 ,2 ]
Zhang, Jingjie [1 ,2 ]
Xiao, Guangchun [1 ,2 ]
Chen, Zhaoqiang [1 ,2 ]
Xu, Chonghai [1 ,2 ]
机构：
[1] Qilu Univ Technol, Shandong Acad Sci, Sch Mech Engn, Jinan 250353, Peoples R China
[2] Shandong Inst Mech Design & Res, Jinan 250353, Peoples R China
[3] Shandong Guiyuan Adv Ceram Co Ltd, Zibo 255086, Peoples R China
来源：
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2023年 / 115卷
基金：
中国国家自然科学基金;
关键词：
Al2O3@Ni; Spark plasma sintering; Microstructure Mechanical properties; Ti(C; N); OXIDATION RESISTANCE; CUTTING PERFORMANCE;
D O I：
10.1016/j.ijrmhm.2023.106295
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
To investigate the effects of the core-shell powders on the microstructure and mechanical properties of Ti(C,N) cermets, Ni-coated Al2O3 (Al2O3@Ni) core-shell powders were made using the heterogeneous precipitationthermal reduction method, and Ti(C,N) cermets with Al2O3@Ni added were made using spark plasma sintering (SPS). The results showed that the addition of powders prevents direct contact between Al2O3 and Ti(C,N) ceramic particles, that the distribution of Ni and Al2O3 in the matrix causes a more uniform discharge of SPS, that the grain size was smaller and the size difference between grains was smaller, and that fine grain strengthening improves the mechanical properties of cermet materials. When the sintering temperature was 1500 degrees C, the Ti(C, N) cermets had the best all-around mechanical performance; their flexural strength was 1277 +/- 21 MPa, hardness was 17.06 +/- 0.25 GPa, and fracture toughness was 7.42 +/- 0.15 MPa center dot m1/2.
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页数：9
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