Effect of Heat Treatment on the Microstructure and Phase Composition of ZrB2-MoSi2 Coating

被引：9

作者：

Kovaleva, Marina ^{[1
]}

Goncharov, Igor ^{[1
,2
]}

Novikov, Vseslav ^{[1
]}

Yapryntsev, Maxim ^{[1
]}

Vagina, Olga ^{[1
]}

Pavlenko, Ivan ^{[1
]}

Sirota, Viacheslav ^{[2
]}

Tyurin, Yuri ^{[3
]}

Kolisnichenko, Oleg ^{[3
]}

机构：

[1] Belgorod State Natl Res Univ, Pobeda 85, Belgorod 308015, Russia

[2] Belgorod State Technol Univ, Kostyukov 46, Belgorod 308012, Russia

[3] NASU, EO Paton Elect Welding Inst, Bozhenko 11, UA-03650 Kiev, Ukraine

来源：

COATINGS | 2019年 / 9卷 / 12期

基金：

俄罗斯科学基金会;

关键词：

carbon/carbon composites; ZrB2-MoSi2; multi-chamber detonation accelerator; thermal treatment; microstructure; X-ray methods; CARBON/CARBON COMPOSITES; OXIDATION BEHAVIOR; PROTECTION; RESISTANCE; PROPERTY; FLAME;

D O I：

10.3390/coatings9120779

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Composite ZrB2-MoSi2 coating modified by Y2O3 and Al was prepared by a new multi-chamber detonation accelerator (MCDS) on carbon/carbon composites. Postdeposition heat treatment of the samples at 1500 degrees C for 1 and 6 h was carried out in air. The effect of heat treatment on the microstructure and phase composition of the ZrB2-MoSi2 coating was investigated by scanning electron microscopy and X-ray diffraction phase analysis. The as-sprayed coating presented as a dense lamellar structure, composed of m-ZrO2, t-ZrO2, some hexagonal ZrB2, and cubic Al phases. The m-ZrO2, c-ZrO2, and h-(alpha-Al2O3) formed at 1500 degrees C. The coatings after heat treatment (1 and 6 h) exhibited a structure without cracks. The porosity (1%) of the coating did not change after heat treatment. Thin, continuous, silica-rich film covered the surfaces of ZrO2 and Al2O3 particles, and could have played a role during heat treatment by acting as a grain lubricant for particle rearrangement.

引用

页数：8

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