Study on Preparation of High Temperature Oxidation-resistant Composite Coating on Nb-W Alloy Used in Aerospace Engine AITranslate
Abstract AITranslate
High-temperature oxidation-resistant protective coating was prepared by slurry fusion sintering on the surface of Nb-W alloy Nb521-1 used in aerospace engine.The bottom layer and surface layer were successively prepared by twice slurry fusion sintering processes to obtain silicide composite coating.Morphology and element content of the coating were analyzed by SEM and EDS.High temperature oxidation resistance at 1 700 ℃ and thermal cycling performance from room temperature to 1 600 ℃ of the coating were tested.And the failure mechanism of the coating was preliminarily discussed.The results show that there is a diffusion layer between the composite coating and the substrate attributed to their mutual diffusion,and the interface is of metallurgical bond.The coating can be continuously used at 1 700 ℃ for 22 h,and its limit frequency of thermal cycling tests from room temperature to 1 600℃ is 1 124 times.The composite coating can effectively prevent the external oxygen from further diffusion to the substrate,and therefore the substrate is well protected in high temperature environment.
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Basic Information:
DOI：
Chinese Library Classification Number:TG174.4[金属学及工艺—金属表面处理]
Citation Information:
High-temperature oxidation-resistant protective coating was prepared by slurry fusion sintering on the surface of Nb-W alloy Nb521-1 used in aerospace engine.The bottom layer and surface layer were successively prepared by twice slurry fusion sintering processes to obtain silicide composite coating.Morphology and element content of the coating were analyzed by SEM and EDS.High temperature oxidation resistance at 1 700 ℃ and thermal cycling performance from room temperature to 1 600 ℃ of the coating were tested.And the failure mechanism of the coating was preliminarily discussed.The results show that there is a diffusion layer between the composite coating and the substrate attributed to their mutual diffusion,and the interface is of metallurgical bond.The coating can be continuously used at 1 700 ℃ for 22 h,and its limit frequency of thermal cycling tests from room temperature to 1 600℃ is 1 124 times.The composite coating can effectively prevent the external oxygen from further diffusion to the substrate,and therefore the substrate is well protected in high temperature environment.
quote
| GB/T 7714-2015 | [1] TIAN Jin-peng, ZHOU Xiao-jun, ZHAO Gang. Study on Preparation of High Temperature Oxidation-resistant Composite Coating on Nb-W Alloy Used in Aerospace Engine[J]. Rare Metals and Cemented Carbides, 2016(2): 18-21. |
| MLA | [1] TIAN Jin-peng, et al., "Study on Preparation of High Temperature Oxidation-resistant Composite Coating on Nb-W Alloy Used in Aerospace Engine." Rare Metals and Cemented Carbides, no. 2, 2016, pp. 18-21. |
| APA | [1] TIAN Jin-peng, ZHOU Xiao-jun, & ZHAO Gang. (2016). Study on Preparation of High Temperature Oxidation-resistant Composite Coating on Nb-W Alloy Used in Aerospace Engine. Rare Metals and Cemented Carbides(2), 18-21. |
| IEEE | [1] TIAN Jin-peng, ZHOU Xiao-jun, and ZHAO Gang, "Study on Preparation of High Temperature Oxidation-resistant Composite Coating on Nb-W Alloy Used in Aerospace Engine," Rare Metals and Cemented Carbides, no. 2, pp. 18-21, 2016. keywords: {Nb-W alloy;silicide composite coating;high temperature oxidation resistance;slurry fusion sintering method;failure mechanism} |