Journal of Inorganic Materials ›› 2018, Vol. 33 ›› Issue (6): 596-602.DOI: 10.15541/jim20170353

• Orginal Article • Previous Articles     Next Articles

Fabrication and Mechanical Property of W-Y2O3 Composites and Graded material

WANG Shi-Yang1,2, FU Yu-Dong1, CHEN Lei2, WANG Yu-Jin2   

  1. 1. College of Materials Science and Chemical Engineering; Harbin Engineering University, Harbin 150001, China;
    2. Institute for Advanced Ceramics; Harbin Institution of Technology, Harbin 150001, China;
  • Received:2017-07-20 Revised:2017-09-15 Online:2018-06-20 Published:2018-05-24
  • About author:WANG Shi-Yang. E-mail: vivienneop@163.com
  • Supported by:
    National Natural Science Foundation of China (51532006, 51172052, 51621091);Program for New Century Excellent Talents in University (NCET-13-0177)

Abstract:

W-Y2O3 composite with the gradient variation of volume content of Y2O3 was fabricated by pressureless sintering process. Phases and microstructure of W-Y2O3 composite were characterized. Fracture mechanism was explored by means of the measured results of mechanical properties and fracture morphology. Distribution of thermal stress in W-Y2O3 graded material during sintering is simulated by finite element method, while feasibility of composition content and structure of each layer are analyzed, then W-Y2O3 graded material is successfully fabricated by this process. The results show that the mechanical properties of W-Y2O3 composite decrease with the increment of volume content of Y2O3, which is mainly contributed to the effects of inherent strength of composed phase, porosity and grain size. Finally, faultless W-Y2O3 graded material with high quality of interface bonding can be fabricated by reasonable design of gradient layers.

 

Key words: W-Y2O3 Graded Material, W-Y2O3 composites, Thermal stress, Mechanical property

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