Fabrication and nanoindentation characterization of MgAlON transparent ceramics

被引：23
作者：
Ma, Benyuan [1 ]
Zhang, Wei [2 ]
Wang, Yuezhong [3 ]
Song, Haizhi [2 ]
Xie, Xiumin [2 ]
Zhang, Zhibin [2 ]
Yao, Chao [2 ]
Luo, Hui [2 ]
Niu, Ruihua [2 ]
机构：
[1] Nanyang Normal Univ, Coll Phys & Elect Engn, Nanyang 473061, Peoples R China
[2] Southwest Inst Tech Phys, Chengdu 610041, Peoples R China
[3] Tianjin Jinhang Tech Phys Inst, Tianjin Key Lab Opt Thin Films, Tianjin 300192, Peoples R China
来源：
OPTICAL MATERIALS | 2018年 / 84卷
基金：
中国国家自然科学基金;
关键词：
MgAlON; Deformation; Nanoindentation; Hardness; Fracture toughness; SCANNING PROBE MICROSCOPY; BULK METALLIC-GLASS; MECHANICAL-PROPERTIES; CARBOTHERMAL POWDER; BORON-CARBIDE; INDENTATION; TOUGHNESS; HARDNESS; PLASTICITY; CRACKING;
D O I：
10.1016/j.optmat.2018.07.047
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Highly transparent MgAlON ceramics were fabricated by pressureless presintering and hot isostatic pressing. The deformation, hardness and fracture toughness of MgAlON transparent ceramics have been studied by nanoindentation technique. The indentation tests were performed with applied loads of 2-400 mN to investigate the variation in mechanical behaviors. It was found that the plastic deformation component dominated MgAlON ceramics at the applied loads from 2 mN to 200 mN. The resistance to plastic deformation decreased when the applied load increased. However, the micro-cracks induced by nanoindentation have been observed at the load above 200 mN. In addition, the true hardness (similar to 13.5 GPa) was determined based on the proportional sample resistance (PSR). Furthermore, the fracture toughness (2.2-2.7 MPa m(1/2)) was evaluated using Laugier's equation. This study lends credible the realization of mechanical properties of the MgAlON transparent ceramics in the design and practical applications.
引用
收藏
页码：714 / 721
页数：8
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