J. Mater. Sci. Technol. ›› 2022, Vol. 120: 139-149.DOI: 10.1016/j.jmst.2022.03.001

• Research Article • Previous Articles     Next Articles

A general strategy towards improving the strength and thermal shock resistance of glass-ceramics through microstructure regulation

Min Fenga, Chengyang Jianga, Minghui Chena,*(), Shenglong Zhub, Fuhui Wanga   

  1. aShenyang National Laboratory for Materials Science, Northeastern University, Shenyang 110819, China
    bChinese Academy of Sciences, Institute of Metal Research, Shenyang 110016, China
  • Received:2021-03-04 Revised:2021-12-05 Accepted:2022-03-01 Published:2022-09-01 Online:2022-03-12
  • Contact: Minghui Chen
  • About author:* E-mail address: mhchen@mail.neu.edu.cn (M. Chen).

Abstract:

Glass-ceramics are usually obtained through controlled crystallization. In this work, we propose a new strategy to add an appropriate amount of oxide particles to the parent glass to improve the performance of glass-ceramics. Different amounts of Al2O3 or/and CeO2 particles were added into a SiO2-Al2O3-ZnO-CaO-ZrO2-TiO2 based glass, and crystallization behavior, fracture strength, and thermal shock behavior were systematically evaluated. The results indicate that with the addition of Al2O3 or/and CeO2 particles of moderate amount, the unfavorable needle-like ZrSiO4, Zn2SiO4, and CaTiSiO5 crystals were largely inhibited when annealed at 900 °C. Accordingly, fracture strength is maintained high after heating at high temperatures. The thermal shock resistance is also enhanced drastically. The additive Al2O3 is thermodynamically favorable to react with the glass, forming particulate ZnAl2O4 instead of precipitating the needle-like crystals of Zn2SiO4 and CaTiSiO5; while CeO2 will combine with ZrO2 to form a solid solution and promote the precipitation of primary crystal CaZrTi2O7 that will not transform to ZrSiO4 with prolonging thermal exposure.

Key words: Non-metallic glasses (silicates), Crystallization, MicrostructureMechanical property, High-temperature oxidation