Premium
Interfacial microstructure evolution of glass‐based coating on IC10 superalloy with a Ni 3 Al bond‐coat at 1050°C
Author(s) -
Wang Xin,
Zhu Shenglong,
Li Zhengxian,
Zhang Yusheng,
Chen Minghui,
Wang Fuhui
Publication year - 2017
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.14897
Subject(s) - microstructure , materials science , corundum , superalloy , coating , metallurgy , composite material , chemical engineering , engineering
A glass‐based composite coating incorporating YSZ, corundum, and Ni 3 Al was prepared on IC10 superalloy with a sputtering Hf‐modified Ni 3 Al bond‐coat. Sealing effect of the glass‐based top‐coat and reactive elemental effect of Hf facilitated the formation of columnar α‐Al 2 O 3 at 1050°C. Furthermore, a discontinuous gahnite interlayer formed at the α‐Al 2 O 3 /top‐coat interface due to interfacial reactions. However, because of the discontinuous microstructure of gahnite, the α‐Al 2 O 3 suffered durative attack by the active glass matrix, which caused severe internal oxidation of Hf and Al within the bond‐coat. In addition, the oxygen barrier ability of the top‐coat changed with its microstructure evolution.