Mechanochemical removal of lithium aluminosilicate glass-ceramics

被引：2
|
作者：
Zhou, Huaicheng [1 ]
Gao, Jian [1 ]
Zhang, Honglin [1 ]
Zhu, Jie [1 ]
Qian, Linmao [1 ]
Yu, Bingjun [1 ]
机构：
[1] Southwest Jiaotong Univ, Tribol Res Inst, Sch Mech Engn, Chengdu 610031, Peoples R China
来源：
TRIBOLOGY INTERNATIONAL | 2023年 / 186卷
基金：
中国国家自然科学基金;
关键词：
Lithium aluminosilicate glass-ceramics; Mechanochemical removal; AFM; Density functional theory; LIME-SILICA GLASS; TRIBOCHEMICAL WEAR; CONTACT PRESSURE; COUNTER-SURFACE; MECHANISM; HUMIDITY; BEHAVIORS; SPEED; COHP;
D O I：
10.1016/j.triboint.2023.108629
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
In this study, the material removal behaviors of diamond and SiO2 tips on lithium aluminosilicate (LAS) glassceramics surface were investigated in vacuum and deionized water using atomic force microscope. Two types of mechanochemical removal, stress corrosion and tribochemical removal were identified depending on countersurface chemical activity. Their mechanisms were revealed using Fourier transform infrared spectroscopy (FTIR) and Density functional theory (DFT) calculations. In addition, combined with Raman spectra detection and thermal annealing experiments of removal areas, it was confirmed that compared with stress corrosion removal which reduced the removal energy threshold, tribochemcial removal was dominated by mechanochemical interaction without structural damage. The findings enrich the mechanochemical removal theory and furnish theoretical guidance for nano-precision machining of LAS glass-ceramic surface.
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页数：10
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