TY - JOUR
T1 - Effect of CaO doping on the properties and crystallization behavior of Y2O3–Al2O3–SiO2 glass
AU - Yang, Shaobo
AU - Ma, Yujie
AU - Li, Jiali
AU - Kou, Sijie
AU - Chen, Bo
AU - Liu, Chidong
AU - Deng, Juanli
AU - Fan, Shangwu
N1 - Publisher Copyright:
© 2023
PY - 2023/10/15
Y1 - 2023/10/15
N2 - Nowadays, Y2O3–Al2O3–SiO2 (YAS) glass joining is considered to be a promising scheme for nuclear-grade continuous silicon carbide (SiC) fiber reinforced SiC matrix composites (SiC/SiC). CaO has great potential for nuclear applications since it has low reactivity and low decay rate under nuclear irradiation. In this paper, the effect of CaO doping on the structure, thermophysical properties, and crystallization behavior of YAS glass was systematically studied. As the CaO doping content increased, the number of bridge oxygens and the viscosity at high temperatures reduced gradually. After heat treatment at 1400 °C, the main phases in YAS glass were β-Y2Si2O7, mullite, and SiO2 (coexistence of crystalline and glass phases), while that with 3.0% CaO doping turned into a single glassy phase under the same treatment conditions. Moreover, a structural model and the modification mechanism were proposed, which provided a theoretical basis for the subsequent component design and optimization.
AB - Nowadays, Y2O3–Al2O3–SiO2 (YAS) glass joining is considered to be a promising scheme for nuclear-grade continuous silicon carbide (SiC) fiber reinforced SiC matrix composites (SiC/SiC). CaO has great potential for nuclear applications since it has low reactivity and low decay rate under nuclear irradiation. In this paper, the effect of CaO doping on the structure, thermophysical properties, and crystallization behavior of YAS glass was systematically studied. As the CaO doping content increased, the number of bridge oxygens and the viscosity at high temperatures reduced gradually. After heat treatment at 1400 °C, the main phases in YAS glass were β-Y2Si2O7, mullite, and SiO2 (coexistence of crystalline and glass phases), while that with 3.0% CaO doping turned into a single glassy phase under the same treatment conditions. Moreover, a structural model and the modification mechanism were proposed, which provided a theoretical basis for the subsequent component design and optimization.
KW - Crystallization behavior
KW - Glass ceramic
KW - SiC/SiC joining
KW - Wetting ability
KW - YO–AlO–SiO
UR - http://www.scopus.com/inward/record.url?scp=85166926566&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2023.08.022
DO - 10.1016/j.ceramint.2023.08.022
M3 - 文章
AN - SCOPUS:85166926566
SN - 0272-8842
VL - 49
SP - 33188
EP - 33196
JO - Ceramics International
JF - Ceramics International
IS - 20
ER -