Microstructure and Crack Formation of the Si-Y_2O_3 Infiltration Coating on Nb-Si-based Ultrahigh-temperature Alloy AITranslate
Abstract AITranslate
Si-Y2O3 infiltration coating was prepared from the Nb-Si-based ultrahigh-temperature alloy surface by the pack infiltration of heating for 10 h at 1 050 ℃ ,1 150℃ and 1 250℃ ,respectively. The effects of Y element on coating morphology and crack formation were investigated by SEM, EDS and XRD. Both prepared by the pack infiltration at the same temperature and duration,Si-Y2O3 infiltration coating was compared with single Si infiltration coating. The results show that the upper part of the outer coating layer is composed of （Nb, M）Si2 columnar grains, and the lower part composed of （Nb, M）Si2 equiaxed grains. The coating microstructure can be refined obviously by adding 0.75% （mass fraction） Y2O3 to the pack mixture. The total length of either vertical cracks or horizontal cracks is relatively small when the Y2O3 amount in pack mixture is in the range from 0.5% to 0.75%.
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Basic Information:
DOI：
Chinese Library Classification Number:TG174.445[金属学及工艺—金属表面处理]
Citation Information:
Si-Y2O3 infiltration coating was prepared from the Nb-Si-based ultrahigh-temperature alloy surface by the pack infiltration of heating for 10 h at 1 050 ℃ ,1 150℃ and 1 250℃ ,respectively. The effects of Y element on coating morphology and crack formation were investigated by SEM, EDS and XRD. Both prepared by the pack infiltration at the same temperature and duration,Si-Y2O3 infiltration coating was compared with single Si infiltration coating. The results show that the upper part of the outer coating layer is composed of （Nb, M）Si2 columnar grains, and the lower part composed of （Nb, M）Si2 equiaxed grains. The coating microstructure can be refined obviously by adding 0.75% （mass fraction） Y2O3 to the pack mixture. The total length of either vertical cracks or horizontal cracks is relatively small when the Y2O3 amount in pack mixture is in the range from 0.5% to 0.75%.
quote
| GB/T 7714-2015 | [1] QI Tao, GUO Xi-ping. Microstructure and Crack Formation of the Si-Y_2O_3 Infiltration Coating on Nb-Si-based Ultrahigh-temperature Alloy[J]. Rare Metals and Cemented Carbides, 2009(4): 7-10. |
| MLA | [1] QI Tao, and GUO Xi-ping. "Microstructure and Crack Formation of the Si-Y_2O_3 Infiltration Coating on Nb-Si-based Ultrahigh-temperature Alloy." Rare Metals and Cemented Carbides, no. 4, 2009, pp. 7-10. |
| APA | [1] QI Tao, & GUO Xi-ping. (2009). Microstructure and Crack Formation of the Si-Y_2O_3 Infiltration Coating on Nb-Si-based Ultrahigh-temperature Alloy. Rare Metals and Cemented Carbides(4), 7-10. |
| IEEE | [1] QI Tao and GUO Xi-ping, "Microstructure and Crack Formation of the Si-Y_2O_3 Infiltration Coating on Nb-Si-based Ultrahigh-temperature Alloy," Rare Metals and Cemented Carbides, no. 4, pp. 7-10, 2009. keywords: {Si-Y2O3 infiltration coating;pack infiltration;coating microstructure;crack} |