Nanosized microstructure of Al2O3-ZrO2 (Y2O3) eutectics fabricated by laser engineered net shaping

被引：102
作者：
Niu, Fangyong [1 ]
Wu, Dongjiang [1 ]
Ma, Guangyi [1 ]
Wang, Jiangtian [1 ]
Guo, Minhai [1 ]
Zhang, Bi [1 ,2 ]
机构：
[1] Dalian Univ Technol, Key Lab Precis & Nontradit Machining Technol, Minist Educ, Dalian 116024, Liaoning, Peoples R China
[2] Univ Connecticut, Dept Mech Engn, Storrs, CT 06269 USA
来源：
SCRIPTA MATERIALIA | 2015年 / 95卷
基金：
中国博士后科学基金;
关键词：
Laser deposition; Eutectic solidification; Hardness test; Ceramics; Al2O3-ZrO2; MECHANICAL-PROPERTIES; COMPOSITES; PLATES;
D O I：
10.1016/j.scriptamat.2014.09.026
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Cylindrical and arc-shaped Al2O3-ZrO2 (Y2O3) eutectic ceramic structures without any binders were directly fabricated by laser engineered net shaping from pure powders. During the process, mixed ceramic powders are completely melted at the required position by a high-energy laser beam, yielding fully dense ceramic with fine-grained microstructure in which the eutectic spacing is similar to 100 nm. The average microhardness and fracture toughness of the produced ceramic are 17.15 GPa and 4.79 MPa.m(1/2), respectively. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：39 / 41
页数：3
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