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个人信息Personal Information
教授
博士生导师
硕士生导师
性别：男
毕业院校：中国科学院长春光学精密机械与物理研究所
学位：博士
所在单位：机械工程学院
学科：机械制造及其自动化
办公地点：机械学院大方楼5021
联系方式：djwudut@dlut.edu.cn 84707625
电子邮箱：djwudut@dlut.edu.cn
Microstructure and mechanical properties of solid AL(2)O(3)-ZRO(2) (Y2O3) eutectics prepared by laser engineered net shaping
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论文类型：期刊论文
发表时间：2017-05-01
发表刊物：JOURNAL OF LASER APPLICATIONS
收录刊物：SCIE、EI、Scopus
卷号：29
期号：2
ISSN号：1042-346X
关键字：laser engineered net shaping; eutectics ceramics; microstructure; mechanical property
摘要：High dense Al2O3-ZrO2 (Y2O3) eutectics were directly prepared based on the raw material of Al2O3-ZrO2 (Y2O3) ceramic powders by laser engineered net shaping. The microstructure, the microhardness, and the fracture toughness of Al2O3-ZrO2 (Y2O3) eutectics were evaluated. The compact cellular eutectic with the nanosize microstructure and the homogeneous dispersion of zirconia fibers embedded in the continuous Al2O3 matrix were obtained, and the periodic coarsening banded structure perpendicular to the deposition direction produced due to the layer-by-layer shaping style. Testing results showed that the microhardness of eutectic ceramic was 17.15 +/- 0.4 GPa, the actual density was 4.407 g/cm(3), and the relative destiny reached up to 98.3%. In addition, the fracture toughness value in the coarsening banded region was 4.79 +/- 0.3 MPa.m(1/2), and the region with the nanosize microstructure eutectic had the fracture toughness value 3.71 +/- 0.3 MPa.m(1/2). The coarsening banded region had the higher fracture toughness than that with the nanosize microstructure eutectic, which was because the large eutectic spacing would reinforce the compressive stress toughening mechanism. (C) 2017 Laser Institute of America.