Nb521表面改性Si-Cr-Ti涂层的高温氧化行为
High Temperature Oxidization Behavior of Modified Si-Cr-Ti Coating on Nb521 Alloy
摘 要
利用料浆烧结法在Nb521合金表面制备了Si-Cr-Ti-W和Si-Cr-Ti-Al-Y2O3涂层，并对这两种涂层在1 400 ℃静态空气中的静态氧化行为进行了测试和研究。利用扫描电镜(SEM)、电子探针(EPMA)和波谱仪(WDS)对涂层在氧化过程中的微观组织形貌、元素分布和相组成进行了测试和分析，并建立了动态高温氧化模型。结果表明: 两种改性涂层的氧化过程都遵循抛物线规律，添加铝、Y2O3和钨均能提高涂层的抗氧化性能。由于Al2O3和SiO2组成的复合氧化膜均匀致密且高温稳定性强，Si-Cr-Ti-Al-Y2O3涂层的抗氧化性能优于Si-Cr-Ti-W涂层的。
铌合金
硅化物涂层
高温氧化
Si-Cr-Ti coating
niobium alloy
silicide coating
high temperature oxidation
Abstract
Si-Cr-Ti-Al-Y2O3 coating and Si-Cr-Ti-W coating were prepared on the surface of Nb521 substrate by stuff paste melting. The static anti-oxidation properties of the coatings were tested at 1 400 ℃. The microstructure, chemical composition, phase distribution of the coatings during the process of oxidation were analyzed by SEM, EPMA and WDS. High temperature oxidation dynamic model of the coatings was established. The results show that the oxidation behavior follows the law of parabola. Adding Al, Y2O3, W, respectively, all can improve the anti-oxidation properties of the coatings. The addition of Y2O3 and Al can evidently improve the quality of the surface and the anti-oxidation ability. The anti-oxidation performance of Si-Cr-Ti-Al-Y2O3 coating was better than that of Si-Cr-Ti-W coating because the oxide films composed of Al2O3 and SiO2 had high temperature stability.
中图分类号 TG172 DOI 10.11973/fsyfh-201605010
所属栏目 试验研究
基金项目 湖南省有色研究基金项目(YSZN2013CL07)
收稿日期 2015/3/11
修改稿日期
网络出版日期
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备注肖来荣(1968-)，教授，博士，从事高温合金及抗氧化涂层相关工作
引用该论文: TANG Xin-yang,SHEN Tong,XIAO Lai-rong,CAI Zhen-yang,ZHAO Xiao-jun,RAO Bo. High Temperature Oxidization Behavior of Modified Si-Cr-Ti Coating on Nb521 Alloy[J]. Corrosion & Protection, 2016, 37(5): 392
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参考文献
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【2】VILASI M,FRANCOIS M. New silicides for new niobium protective coatings[J]. Journal of Alloys and Compounds,1998,264(1/2): 244-251.
【3】李争显. 铌合金表面高温抗氧化涂层[J]. 稀有金属快报,2006,25(4): 6-9.
【4】ROGER A P,GERALD H M. The oxidation behavior and protection of niobium[J]. Journal of Metals,1990,8(1): 20-21.
【5】RDHAMMER P,KNABL W,SEMPRIMOSCHNIG C. Protection of Nb and Ta-based alloys against high temperature oxidation[J]. International Journal of Refractory Metals and Hard Materials,1993,12(5): 283-293.
【6】贾中华. 料浆法制备铌合金和钼合金高温抗氧化涂层[J]. 粉末冶金技术,2001,19(2): 1-3.
【7】王禹,郜嘉平,李云鹏,等. 铌合金硅化物涂层的结构及高温抗氧化性[J]. 无机材料学报,2000,15(1): 144-149.
【8】王禹,陈旻,郜嘉平,等. 铌合金表面改性Ti-Cr-Si保护涂层耐热性研究[J]. 空间科学学报,2000,20(3): 262-270.
【9】肖来荣,蔡志刚,易丹青,等. 料浆烧结法制备改性Si-Cr-Ti高温抗氧化涂层的研究[J]. 稀有金属与硬质合金,2005,33(2): 23-27.
【10】翟金坤,马祥,白新德,等. C-103铌合金上料浆熔烧涂层的改性研究[J]. 航空学报,1994,15(4): 499-506.
【11】任家松,郭喜平. 合金化及涂层技术提高铌基合金的抗高温氧化性能[J]. 稀有金属与硬质合金,2006,34(2): 45-47.
【12】DZYADKYEVICH Y V. Protective coatings on niobium, molybdenum and tungsten for high temperature oxidation resistance[J]. Poroshk Metall,1992,5(4): 37-42.
【13】MDZAFIR A,SABYASACHI S,BIJOY S. Formation of WSi2 coating on tungsten and its short-term cyclic oxidation performance in air[J]. International Journal of Refractory Metals and Hard Materials,2011,29(1): 54-63.
【14】MD ZAFIR A,VENKATARAMAN B,SARMA B,et al. MoSi2 coating on Mo substrate for short term oxidation protection in air[J]. Journal of Alloys and Compounds,2009,487(1): 335-340.
【15】XIANG D,ROSE S R,DATTA P K. Codeposition of Al and Si to form oxidation-resistant coatings on γ-TiAl by the packcementation process[J]. Materials Chemistry and Physics,2003,80(6): 482-489.
【16】GLUSHKO P I,SEMENOV N A,STRIGUNOVSKII S V. Oxidation resistance of niobium coated with titanium disilicide[J]. Powder Metallurgy and Metal Ceramics,2000,39(4): 560-562.
【17】宋复斌,张琦,武昕. 铝硅涂层循环氧化的计算机模拟[J]. 腐蚀与防护,2002,23(12): 523-525.
【18】蔡圳阳,肖来荣,余宸旭,等. Nb-Ti-Al合金及其硅化物涂层的高温氧化行为[J]. 粉末冶金材料科学与工程,2013,18(1): 94-100.
【19】许谅亮,张霞,肖来荣,等. Nb-Ti-Al高温铌合金氧化行为研究[J]. 稀有金属与硬质合金,2006,34(4): 6-10.
【20】DANIEL M,PIERAGGI B. Determination of parabolic rate constants from a local analysis of mass-gain curves[J]. Oxidation of Metals,1998,50(5/6): 477-481.
【21】ZAREZADEH M M,SHAMANIAN M,SAIDI A. Laser cladding of CoWSi/WSi2 on Ni substrate and evaluation of its high temperature oxidation behavior[J]. Ceramics International,2014,40(8): 13447-13452.
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