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产实践中.由于微合金化元素的加入量很少,一般可以推断其工作机理应与固溶强化关系不大,而主要与形核和长大,以及与位错,亚结构,或界面等发生的相互作用有关. 镍基合金高温热障涂层(Thermal barrier coatings, TBCs)在航空发动机,燃气轮机,和高温固体燃料电池等众多重要材料系统中发挥着关键性作用.在涂层制备或服役过程中,在镍基过渡层合金(Bond coat, BC)表面逐渐形成...). REFERENCES [1] EVANS A G, MUMM D R, HUTCHINSON J W, MEIER G H, PETTIT F S. Mechanisms controlling the durability of thermal barrier coatings[J]. Progress in Materials Science, 2001, 46(5): 505-553. [2......
Microstructure studies of air-plasma-spray-deposited CoNiCrAlY coatings before and after thermal cyclic loading for high-temperature applicationDipak Kumar1,K.N.Pandey1,Dipak Kumar Das2摘 要:In the present study, bond-coats for thermal barrier coatings were deposited via air plasma spraying(APS) techniques onto Inconel 800 and Hastelloy C-276 alloy......
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稀土锆酸盐Sm_2Zr_2O_7的二价离子掺杂研究 潘伟1,瞿志学1,万春磊1 (1.清华大学,先进陶瓷与精细工艺国家重点实验室,北京,100084) 摘要:研究了二价元素Ca,Sr,Ba在稀土锆酸盐Sm_2Zr_2O_7中掺杂固溶情况,并采用激光闪射法测定了固溶样品的热导率.X射线衍射数据表明,相对于Mg~(2+)离子,Ca~(2+),Sr~(2+),Ba~(2+)离子在Sm_2Zr_2O_7中的固溶度并不大,在较小的掺杂量时,就有相应的锆酸盐化合物相析出,这是掺杂机制的不同造成的;而固溶样品的热导率测试结果说明,掺杂能降低材料的热导率,但降低幅度不大. 关键词:热障涂层; 稀土锆酸盐; 二价掺杂; 热导率; thermal barrier coatings; rare-earth zirconate; bivalent ions doping; thermal......
of the RF PACVD method in the pure methane atmosphere on their phase structure and mechanical properties. In the second case authors present the concept of a new special multilayer thermal barrier coatings with the PAPVD diffusion barrier layers based on aluminium oxide. As the last one the special application of plasma techniques for creation of composite materials characterized by the muffling......
℃). The flowability of LCZ powder sintered at 1 400 ℃ is improved clearly, and which could be used in plasma spray coatings. Key words: lanthanum zirconate; composite ceramics; thermal barrier coatings...,LCZ陶瓷粉末具有良好的流动速度,可用于等离子喷涂. REFERENCES [1] Uwe S, Christoph L, Klaus F. Some recent trends in research and technology of advanced thermal barrier coatings [J]. Aerospace Science and Technology, 2003......
and the substrate was protected well, being exposed to high temperatures up to 900 ℃. The coatings withstood more than ten times thermal shock tests without any coating separation. The thermal expansion coefficient.... Isothermal mass gain of the coatings at elevated temperature in dry air was measured by means of a thermal balance and the oxidation behavior was evaluated by oxidation kinetic curves, exhibiting......
. Thermal fatigue behaviour of thermal barrier coatings with the MCrAlY bond coats by cold spraying and low-pressure plasma spraying[J]. Surface and Coatings Technology, 2010, 205(7): 2225-2233. [6] ZHANG.... Thermal barrier coatings for gas-turbine engine applications[J]. Science, 2002, 296(5566): 280-284. [8] NICHOLLS J R. Advances in coating design for high- performance gas turbines[J]. Materials......
Theoretical Investigation on Mechanical and Thermal Properties of a Promising Thermal Barrier Material:Yb3Al5O12Yanchun Zhou,Huimin Xiang,Zhihai FengScience and Technology of Advanced Functional... as a prospective thermal barrier coating material.关键词:......
High-entropy(Y0.2Nd0.2Sm0.2Eu0.2Er0.2)AlO3: A promising thermal/environmental barrier material for oxide/oxide compositesZifan Zhao1,2,Heng Chen1,Huimin Xiang1,Fu-Zhi Dai1,Xiaohui Wang3,Zhijian... perovskite(YAl O3) is a promising candidate material for environmental barrier coatings(EBCs) to protect Al2 O3 f/Al2 O3 ceramic matrix composites(CMCs) from the corrosion of high-temperature water......
