Journal of Radiation Research and Radiation Processing ›› 2020, Vol. 38 ›› Issue (3): 68-76.doi: 10.11889/j.1000-3436.2020.rrj.38.030702

• RADIATION INTERDISCIPLINARY RESEARCH • Previous Articles    

Subcritical water corrosion resistance of Zr-doped Ti3SiC2 ceramics

DONG Junpeng1,2,YANG Qiuhong1(),ZOU Yuqi2(),ZHANG Zhaoquan2,FAN Wugang2   

  1. 1.School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
    2.Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China
  • Received:2019-12-19 Revised:2020-01-08 Accepted:2020-01-08 Online:2020-06-20 Published:2020-06-18
  • Contact: YANG Qiuhong,ZOU Yuqi E-mail:yangqiuhong@shu.edu.cn;yqzou@mail.sic.ac.cn
  • About author:DONG Junpeng (male) was born in July 1994, and obtained his bachelor’s degree from Hefei University of Technology in 2016. Now he is a graduate student joint cultivated by Shanghai University and Shanghai Institute of Ceramics, Chinese Academy of Sciences
  • Supported by:
    the National Major Project(2017ZX06002004);the Key Deployment Project of Chinese Academy of Sciences(ZDRW-CN-2017-1)

Abstract:

A Zr-doped MAX phase (Ti(1-x)Zr)3SiC2 ceramic (with a purity of approximately 97% and impurities of TiC) was synthesized using hot pressing to improve the subcritical water corrosion resistance of Ti3SiC2. After corrosion in deionized water at 360 °C and 18 MPa, a passivated corrosion layer was formed on the surface of the (Ti(1-x)Zrx)3SiC2 ceramic. The outer layer consisted of TiO2 and thex inner layer was a mixture of TiO2 and ZrO2. As Zr doping increased, the corrosion oxide layer on the surface of the (Ti(1-x)Zrx)3SiC2 ceramic became thinner. When the Zr doping was 15%, the change in quality of (Ti(1-x)Zrx)3SiC2 ceramic was the smallest and the oxide film the thinnest after corrosion; the thickness of the oxide film was 12 μm after 200 h of corrosion. At 15% Zr doping, the mechanical and thermal properties were excellent. The hardness, bending strength, and thermal conductivity of Ti3SiC2 ceramic are 3.2 GPa, (479.673 ± 10.012) GPa, and 33.93 W/(m?K), respectively.

Key words: Doping, Ti3SiC2, Subcritical water, Corrosion resistance, Coefficient of thermal expansion, Thermal conductivity

CLC Number: 

  • TL13