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| 1 | NiCrAlY涂层抗氧化性及氧化过程中的微观结构演变显示文摘采用低压等离子喷涂技术在镍基铸造高温合金K438基体上制备NiCrAlY涂层,研究涂层和基体在950℃下恒温氧化100h的氧化动力学规律。采用SEM、EDS和XRD等检测涂层和基体经不同时间氧化后的微观结构演变和元素分布。结果显示:涂层氧化增重缓慢,氧化动力学曲线符合抛物线规律,100h后表面形成一层厚度1.5μm左右致密Al2O3保护膜;基体开始时氧化增重迅速,60h之后发生破坏性氧化,基体开始迅速失重。EDS分析显示:元素在涂层氧化过程中发生缓慢扩散,扩散距离达到90μm,涂层的结构更加致密。 | 张新格 邓畅光 邓春明 裴和中 | 2015 | 航空材料学报2015，35，5： | 7 |
| 2 | DZ125合金表面Ce-Y改性铝化物渗层的热冲击性能研究显示文摘采用扩散渗法于950℃下扩散渗2 h后在DZ125镍基合金表面制备了Al-Ce-Y渗层,研究了Al-Ce-Y渗层试样和基体合金的热冲击性能,分析了热冲击裂纹的形态结构。结果表明:在实验条件下,DZ125合金基体和Al-Ce-Y渗层试样出现可视裂纹的热冲击次数分别为195、184次。该过程中渗层结构保持完整,无剥落现象,表明Al-Ce-Y渗层可满足DZ125合金对抗热冲击性能的服役要求。 | 郭诗琪 田兴达 李宁 陆思萍 冯浩 王存喜 李涌泉 | 2023 | 热加工工艺2023，52，22： | 0 |
| 3 | Formation Mechanism of a Y-modified Cr-Al Coating Co-deposited on DZ125 Alloy and Its High-temperature Oxidation Resistance显示文摘Y-modified Cr-Al coatings were co-deposited on DZ125 alloy by a pack cementation process,and the microstructures,constituent phases,and formation mechanisms of the obtained coatings were studied.The oxidation resistance of the coatings was also investigated.The experimental results show that the coating prepared by co-depositing Cr-Al-Y at 1050℃for 2 h has a multi-layered structure with an outer layer composed of Cr and Ni_(3)Cr_(2),a middle layer composed of Ni_(3)Cr_(2) and Al_(13)Co_(4),and an inner layer composed of Ni_(3)Al.The co-deposited Y is mainly present in the outer and middle layers of the coating.The coating formation process follows a sequential deposition mechanism in which Al is deposited during the initial stage,followed by Cr deposition.After oxidation at 1100℃for 100 h,a dense Cr_(2)O_(3)·Al_(2)O_(3) scale forms on the obtained coating,which effectively protects the DZ125 alloy from oxidation by preventing the inward diffusion of oxygen. | 李涌泉 LIANG Guodong TIAN Xingda WANG Cunxi HE Ninghui QIN Chun | 2022 | Journal of Wuhan University of Technology(Materials Science)2022，37，2： | 0 |
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