Effect of Al2O3 and SiO2 Inert-Fillers on the Microstructural Evolution and High Temperature Oxidation Resistance of B Modified Silicides Coatings Prepared by Pack Cementation Technology
| Autor: | Linfen Su, Jianyong Yang, Kaiyong Jiang, Guanqun Zhuo, Haiwen Song |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
oxidation resistance
Inert Microstructural evolution Materials science Alloy Surfaces and Interfaces engineering.material Engineering (General). Civil engineering (General) Cementation (geology) Surfaces Coatings and Films chemistry.chemical_compound Coating chemistry Chemical engineering inert-filler Silicide Materials Chemistry engineering Nb-Si based alloy TA1-2040 Si-B coating Layer (electronics) Oxidation resistance |
| Zdroj: | Coatings, Vol 11, Iss 700, p 700 (2021) Coatings Volume 11 Issue 6 |
| ISSN: | 2079-6412 |
| DOI: | 10.3390/coatings11060700 |
| Popis: | In this study, B modified silicide coatings were prepared on Nb-Si based alloy with Al2O3 or SiO2 inert-filler by pack cementation technology. Both coatings primarily consisted of a (Nb,X)Si2 with a (Nb,X)B2 + (Nb,X)Si2 outer layer. After oxidation at 1250 °C for 100 h, the coatings showed good oxidation resistance due to the formation of a dense silica. The oxidation products of the coating prepared with Al2O3 inert-filler consisted of SiO2, TiO2 and Cr2O3, while that of the coating prepared with SiO2 inert-filler consisted of SiO2, TiO2, Cr2O3, and HfO2. The different oxidation products may be due to the different oxidation process of these two sample at initial oxidation stage. |
| Databáze: | OpenAIRE |
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