Mechanical properties and microstructure of Al2O3/TiC based self-lubricating ceramic tool with CaF2@Al (HO)3

被引：15

作者：

Chen, Zhaoqiang ^{[1
,2
]}

Ji, Lianggang ^{[1
,2
]}

Guo, Niansheng ^{[1
,2
]}

Guo, Runxin ^{[1
,2
]}

机构：

[1] Qilu Univ Technol, Sch Mech & Automot Engn, Shandong Acad Sci, Jinan 250353, Shandong, Peoples R China

[2] Qilu Univ Technol, Key Lab Adv Mfg & Measurement & Control Technol L, Shandong Acad Sci, Jinan 250353, Shandong, Peoples R China

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2018年 / 75卷

关键词：

Shell-core coating; Self-lubricating tool; Microstructure; Performance test; PERFORMANCE; COMPOSITES; ADDITIONS; POWDER;

D O I：

10.1016/j.ijrmhm.2018.04.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The CaF2@Al2O3 coated powder with shell-core structure was prepared by liquid-phase non-uniform nucleation method. Based on the successful preparation of Al(OH)(3) coated CaF2 powder, Al2O3/TiC self-lubricating tool was prepared by wet dispersion mixing and vacuum hot pressing sintering process. The microstructure and performance of the self-lubricating ceramic tool with different volume content of CaF2@Al(OH)(3) coated powders were investigated. The results show that when the CaF2@Al2O3 content is 10 vol%, the comprehensive mechanical properties of Al2O3/TiC/CaF2@Al2O3 tool materials is the best, the hardness is 16.86 GPa, the flexural strength is 662 MPa, and the fracture toughness is 6.34 MPa.m(1/2). Compared with the traditional Al2O3/TiC/10 vol%CaF2 self-lubricating ceramic cutting tools, Al2O3/TiC/10 vol% CaF2@Al2O3 ceramics in flexural strength, fracture toughness and hardness were increased 19.06%, 36.9%, 12.25%, of which the most obvious increase in fracture toughness.

引用

页码：50 / 55

页数：6

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