摘要
To develop an ultra-high-temperature resistant coating for a reusable thermal protection system,the preparation of a tantalum-based MoSi_(2)-Mo coating by a new two-step process of multi-arc ion plating and halide activated pack cementation is presented.The coating has a dense structure and is well compatible with the tantalum substrate,which can be thermally shocked from room temperature to 1750℃ for 360 cycles without failure.The mechanism of the coating’s excellent resistance to high-temperature thermal shocks is that a strong-binding gradient interface and a dense SiO_(2) oxide scale with good oxygen resistance are formed by the high-temperature self-diffusion of Si.
基金
This work was supported financially by the National Natural Science Foundation of China under Grant No.51901252
the National Major Science and Technology Projects of China under Grant No.0101040201
the National Defense Basic Scientific Research Program of China under Grant JCKY2017110B001
the Natural Science Foundation of Hunan Province under Grant No.2020JJ5713 and No.2020JJ5737。
