标题:Al2O3-coated h-BN composite powders and as-prepared Si3N4-based self-lubricating ceramic cutting tool material
作者:Zhang, Wenliang; Yi, Mingdong; Xiao, Guangchun; Ma, Jun; Wu, Guangyong; Xu, Chonghai
作者机构:[Zhang, Wenliang; Yi, Mingdong; Xiao, Guangchun; Ma, Jun; Wu, Guangyong; Xu, Chonghai] Qilu Univ Technol, Sch Mech & Automot Engn, Jinan 250353, Shand 更多
通讯作者:Xu, CH
通讯作者地址:[Xu, CH]Qilu Univ Technol, Sch Mech & Automot Engn, Jinan 250353, Shandong, Peoples R China.
来源:INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
出版年:2018
卷:71
页码:1-7
DOI:10.1016/j.ijrmhm.2017.10.018
关键词:Surface coating modification; Heterogeneous nucleation process;; Self-lubricating; Si3N4 ceramic cutting tool
摘要:The surfaces of solid lubricant hexagonal boron nitride (h-BN) powders were coated with compacted and integrated Al(OH)(3) by heterogeneous nucleation and then the h-BN@Al2O3 composite powders were prepared by calcination under vacuum at 1200 degrees C for 2 h, as determined by SEM, EDS and XRD. The Si3N4 self-lubricating ceramic cutting tool material with coated h-BN was prepared by vacuum hot pressing. Microstructure analysis showed that the h-BN@Al2O3 particles were dispersed homogeneously in the matrix and that the particles were tightly bound. Vickers hardness was 14.1 GPa, fracture toughness was 7.2 MPa.m(1/2), and flexural strength was 732 MPa, as determined by mechanical property testing. The hardness, fracture toughness, and flexural strength of the material were increased by 27.0%, 5.9% and 22.2%, respectively, relative to the material to which un-coated h-BN was added. Cutting tests showed that the Si3N4/TiC/(h-BN@Al2O3) self-lubricating ceramic cutting tool had better antifriction property and wear resistance than the corresponding cutting tool.
收录类别:SCOPUS;SCIE
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85033396803&doi=10.1016%2fj.ijrmhm.2017.10.018&partnerID=40&md5=8c9ae339dc8d98b52c0ca163183d08d2
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