共搜索到4980条信息,每页显示10条信息,共498页。用时:0小时0分0秒234毫秒
Hastelloy N合金表面激光熔覆NiCoCrAlY涂层在LiF-NaF-KF熔盐中的腐蚀行为研究朱红梅1,陈明慧1,唐忠锋2,申龙章1,邱长军11. 南华大学2. 中国科学院上海应用物理研究所摘 要:采用激光熔覆同步送粉技术在HastelloyN合金表面制备了NiCoCrAlY涂层,研究了HastelloyN基材和含NiCoCrAlY涂层的HastelloyN试样在900℃LiF-NaF-KF熔盐中的腐蚀行为.利用失重腐蚀法评估了试样的耐熔盐腐蚀能力,采用XRD和SEM表征了基材和涂层的物相组成,显微组织和腐蚀形貌,并结合EDS分析了微区成分.结果表明,NiCoCrAlY涂层试样的腐蚀速率仅为Hastelloy N基材的2/3.Hastelloy N基材表现为晶间腐蚀,其中Cr元素沿晶界发生选择......
......
Influencing factors of surface roughness of MAO ceramic coating on AZ91D DI Shi-chun (狄士春), PAN Ming-qiang (潘明强), CHI Guan-xin (迟关心) School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China Received 28 July 2006; accepted 15 September 2006 Abstract:To investigate the treating parameters’ influence on the surface roughness of the MAO ceramic coating......
Aluminizing Coating and Aluminizing-Y2O3 Coating Deposited by Pulsed Spark 高高唯1,王德仁2,何业东2,齐惠滨2,黄祖芬2 (1.Department of Chemistry and Material Engineering, University of Auckland, Auckland, New Zealand;2.Department of Surface Science and Corrosion Engineering, University of Science and Technology Beijing,) Abstract:Aluminizing coating and aluminizing-dispersed Y2O3 composite coating were prepared......
真空预氧化对冷喷涂NiCoCrAlY涂层氧化行为的影响张林伟,王鲁,王全胜,宁先进北京理工大学材料学院摘 要:利用冷喷涂技术制备了NiCoCrAlY涂层,并对涂层进行了真空预氧化处理.结合X射线衍射,扫描电镜和能谱分析等方法分析了NiCoCrAlY涂层真空预氧化前后的微观组织结构,并研究了真空预氧化处理对NiCoCrAlY涂层在1050℃下氧化行为的影响.结果表明:冷喷涂NiCoCrAlY涂层含氧量为0.25%(质量分数),孔隙率小于0.36%.真空预氧化处理使涂层由γ-Matrix Ni-Co-Cr单相结构转变为γ-Matrix Ni-Co-Cr固溶体和β-(Ni,Co)Al金属间化合物双相结构,并在涂层表面生成厚约0.47μm连续,致密的α-Al2O3氧化膜.喷涂态涂层和真空预氧化涂层在1050......
高温含水气氛对Pt改性NiCoCrAlY合金氧化行为的影响熊锡平,宋鹏,臧俊杰,罗恒,李超,陈昆伦昆明理工大学材料学院摘 要:为了研究Pt改性NiCoCrAlY合金在高温含水气氛中的高温抗氧化行为,进一步理解高温含水气氛对Pt改性涂层表面形貌以及产物的影响,采用电镀方式在NiCoCrAlY合金表层制备了一层1.5μm厚的Pt层,然后对涂层进行热处理.对Pt改性NiCoCrAlY涂层在1 050℃的空气和含水气氛下的高温氧化行为进行对比研究.采用扫描电镜(SEM)观察表面形貌,采用X射线衍射仪(XRD),能谱(EDS)分析了涂层的相结构及成分.结果表明:在含水气氛下,Pt改性合金表面生成针状Al2O3,基体不同相β-NiAl与γ’-Ni3Al在含水气氛中表现出不同的Al2O3生长速率,从而导致氧化层中生......
......
......
J. Cent. South Univ. Technol. (2008) 15: 54-58 DOI: 10.1007/s11771-008-0012-0 Synthesis of P(St-BA-MAA-SPAA) nano-latex and its application in high anti-corrisive coating LIU Hai... were investigated. And the anti-corrosive property of the resultant zinc-rich coating was studied. The results show that the nano-latex is self-stabilized and has a narrow particle diameter......
Wear resistance of ceramic coating on AZ91 magnesium alloy by micro-arc oxidation ZHAO Hui(赵 晖)1, 2, LIU Zheng(刘 正)1, CHEN Li-jia(陈立佳)1, CHEN Ji(陈 吉) 3, HAN Zhong(韩 忠)3 1. College of Materials... of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China Received 25 September 2006; accepted 7 Oct 2006 Abstract: The ceramic coating formed on AZ91 magnesium alloy by micro-arc......