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Development of oxide based diffusion barrier coatings for CFC components applied in modern furnaces
Kirsten BOBZIN, Lidong ZHAO, Thomas SCHLAEFER, Thomas WARDA
《机械工程前沿(英文)》 2011年 第6卷 第4期 页码 392-396 doi: 10.1007/s11465-011-0241-z
Carbon fibre reinforced carbon (CFC) materials show a high potential for usage in furnaces as sample carriers for example, which is due to their excellent thermal stability compared to steel carriers. Only their tendency to react with different metals at high temperatures by C-diffusion is a disadvantage, which can be solved by application of diffusion barriers. In order to enable the utilization of CFC-carriers for e.g. brazing furnaces, within the frame of this study thermally sprayed diffusion barrier coatings were developed. Coatings of mullite and ZrO2-7%βY2O3 (YSZ) were prepared by air plasma spraying (APS). The coatings were investigated in terms of their microstructure and thermal shock behaviour. In order to prove the suitability of the coatings for the application in brazing furnaces, the wettability of the coating surfaces by a Ni-based brazing alloy was investigated. The results showed that both mullite and YSZ could be deposited on CFC substrates with a bond coat of W or SiC. Both coatings exhibited good thermal shock behaviour and an excellent non-wetting behaviour against the used Ni-based braze alloy.
关键词: diffusion barrier coatings carbon fibre reinforced carbon (CFC) plasma spraying microstructure furnace
Feasibility study of plasma sprayed Al2O3 coatings as diffusion barrier on CFC
Kirsten BOBZIN, Lidong ZHAO, Nils KOPP, Thomas WARDA
《机械工程前沿(英文)》 2012年 第7卷 第4期 页码 371-375 doi: 10.1007/s11465-012-0339-y
Carbon fibre reinforced carbon (CFC) materials are increasingly applied as sample carriers in modern furnaces. Only their tendency to react with different metals at high temperatures by C-diffusion is a disadvantage, which can be solved by application of diffusion barriers. Within this study the feasibility of plasma sprayed Al2O3 coatings as diffusion barrier was studied. Al2O3 coatings were prepared by air plasma spraying (APS). The coatings were investigated in terms of their microstructure, bonding to CFC substrates and thermal stability. The results showed that Al2O3 could be well deposited onto CFC substrates. The coatings had a good bonding and thermal shock behavior at 1060°C. At higher temperature of 1270°C, crack network formed within the coating, showing that the plasma sprayed Al2O3 coatings are limited regarding to their application temperatures as diffusion barrier on CFC components.
关键词: diffusion barrier coatings CFC plasma spraying microstructure Al2O3
Preparation and characterization of nanocrystalline ZrO2-7%Y2O3 powders for thermal barrier coatings
Kirsten BOBZIN, Lidong ZHAO, Thomas SCHLAEFER, Thomas WARDA
《机械工程前沿(英文)》 2011年 第6卷 第2期 页码 176-181 doi: 10.1007/s11465-011-0220-4
High-energy ball milling is an effective method to produce nanocrystalline oxides. In this study, a conventional ZrO2-7%Y2O3spray powder was ball-milled to produce nanocrystalline powders with high levels of crystalline disorders for deposition of thermal barrier coatings. The powder was milled both with 100Cr6 steel balls and with ZrO2-3%Y2O3 ceramic balls as grinding media. The milling time was varied in order to investigate the effect of the milling time on the crystallite size. The powders were investigated in terms of their crystallite sizes and morphologies by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that under given milling conditions the powder was already nanostructured after 40 min milling. The crystallite size decreased significantly with increasing milling time within first 120 min. After that, a further increase of milling time did not lead to a significant reduction of the crystallite size. Ball-milling led to lattice microstrains. Milling with the steel balls resulted in finer nano-sized crystal grains, but caused the contamination of the powder. The nano-sized crystal grains coarsened during the heat-treatment at 1250°C.
关键词: nanostrucured powders yttria stabilized zirconia (YSZ) high-energy ball milling thermal barrier coatings
Effect of TGO on the tensile failure behavior of thermal barrier coatings
Le WANG, Yuelan DI, Ying LIU, Haidou WANG, Haoxing YOU, Tao LIU
《机械工程前沿(英文)》 2019年 第14卷 第4期 页码 452-460 doi: 10.1007/s11465-019-0541-2
关键词: thermally grown oxides thermal barrier coatings acoustic emission technology digital image correlation pores
Time of flight improved thermally grown oxide thickness measurement with terahertz spectroscopy
《机械工程前沿(英文)》 2022年 第17卷 第4期 doi: 10.1007/s11465-022-0705-3
关键词: thermal barrier coatings thermally grown oxide terahertz spectroscopy time of flight
Chao Wang, Jun Chen, Jihua He, Jing Jiang, Qinyong Zhang
《化学科学与工程前沿(英文)》 2020年 第14卷 第6期 页码 1065-1071 doi: 10.1007/s11705-019-1909-x
关键词: aluminum alloy micro-arc oxidation coating electrolyte concentration tribological performance
Zongde LIU, Miao LIU, Liping ZHAO
《能源前沿(英文)》 2011年 第5卷 第3期 页码 257-262 doi: 10.1007/s11708-010-0129-3
关键词: cermets cermet coatings/claddings electro-thermal explosion spraying reaction synthesis
Research on a quantificational method for chromatic-light emotions of architectural wall coatings in
Ting WANG, Ma JIAN, Gang LIU, Xiaoxi LIU, Mingyu ZHANG
《结构与土木工程前沿(英文)》 2010年 第4卷 第4期 页码 498-502 doi: 10.1007/s11709-010-0096-0
关键词: landscape illumination architectural wall coatings chromatic-light emotion quantitative research
Arunkumar JAYAKUMAR
《能源前沿(英文)》 2019年 第13卷 第2期 页码 325-338 doi: 10.1007/s11708-019-0618-y
关键词: PEM fuel cell gas diffusion electrode(GDE) gas diffusion layer(GDL) membrane electrode assembly durability fuel cell catalyst
通过 B 位Ta置换对 AB O4型EuNbO4的热学和力学性质进行优化 Article
陈琳, 冯晶
《工程(英文)》 2020年 第6卷 第2期 页码 177-184 doi: 10.1016/j.eng.2019.12.006
铁弹性的ABO4型RETaO4陶瓷和RENbO4陶瓷(RE表示稀土)是具有潜在应用价值的热障涂层(TBC)材料,研究人员正在对其进行大量研究。结果显示, RETaO4陶瓷的力学性质优于RENbO4陶瓷的力学性质。在本研究中,我们通过B位钽(Ta)置换对利用固相法(SSR)制备的EuNbO4陶瓷的热学和力学性质进行优化。我们使用X射线衍射(XRD)法和拉曼光谱技术对所制备的晶体结构进行确认,并利用扫描电子显微镜(SEM)对结构表面的微观形貌进行观察。结果表明,通过B位Ta置换可以有效提高EuNbO4陶瓷的杨氏模量和热膨胀系数(TEC),且其最大值分别为169 GPa和1.12×10−5 K−1(1200 ℃); EuNbO4陶瓷的热导率被降低至1.52 W·K–1·m–1(700 ℃),且材料的抗热辐射能力得到了改善。我们建立了声子热扩散系数与温度之间的关系,用以通过消除热辐射效应来确定声子本征热导率。研究结果表明,通过B位Ta置换能够有效优化EuNbO4的热学和力学性质,从而使得此种材料在将来可成为一种高温结构陶瓷材料。
《环境科学与工程前沿(英文)》 2022年 第16卷 第12期 doi: 10.1007/s11783-022-1591-y
● A novel PRB configuration based on passive convergent flow effect was proposed.
关键词: Passive convergence-permeable reactive barrier (PC-PRB) Permeable reactive barrier configuration Numerical simulation Hydraulic performance evaluation Sensitivity analysis
Coupled diffusion of chloride and other ions in saturated concrete
Nattapong DAMRONGWIRIYANUPAP, Linyuan LI, Yunping XI
《结构与土木工程前沿(英文)》 2011年 第5卷 第3期 页码 267-277 doi: 10.1007/s11709-011-0112-z
关键词: diffusion chloride concrete Nernst-Planck equation durability
Effects of additive NaI on electrodeposition of Al coatings in AlCl
Tianyu Yao, Haiyan Yang, Kui Wang, Haiyan Jiang, Xiao-Bo Chen, Hezhou Liu, Qudong Wang, Wenjiang Ding
《化学科学与工程前沿(英文)》 2021年 第15卷 第1期 页码 138-147 doi: 10.1007/s11705-020-1935-8
Hydrogen production from methanol through dielectric barrier discharge
Baowei WANG, Xu ZHANG, Haiying BAI, Yijun Lü, Shuanghui HU
《化学科学与工程前沿(英文)》 2011年 第5卷 第2期 页码 209-214 doi: 10.1007/s11705-010-1018-3
Experimental study of humid air reverse diffusion combustion in a turbulent flow field
GE Bing, ZANG Shusheng, GU Xin
《能源前沿(英文)》 2007年 第1卷 第4期 页码 428-434 doi: 10.1007/s11708-007-0062-6
关键词: propane/humid propane/air turbulent bluff-body turbulent diffusion
标题 作者 时间 类型 操作
Development of oxide based diffusion barrier coatings for CFC components applied in modern furnaces
Kirsten BOBZIN, Lidong ZHAO, Thomas SCHLAEFER, Thomas WARDA
期刊论文
Feasibility study of plasma sprayed Al2O3 coatings as diffusion barrier on CFC
Kirsten BOBZIN, Lidong ZHAO, Nils KOPP, Thomas WARDA
期刊论文
Preparation and characterization of nanocrystalline ZrO2-7%Y2O3 powders for thermal barrier coatings
Kirsten BOBZIN, Lidong ZHAO, Thomas SCHLAEFER, Thomas WARDA
期刊论文
Effect of TGO on the tensile failure behavior of thermal barrier coatings
Le WANG, Yuelan DI, Ying LIU, Haidou WANG, Haoxing YOU, Tao LIU
期刊论文
Time of flight improved thermally grown oxide thickness measurement with terahertz spectroscopy
期刊论文
Effect of electrolyte concentration on the tribological performance of MAO coatings on aluminum alloys
Chao Wang, Jun Chen, Jihua He, Jing Jiang, Qinyong Zhang
期刊论文
Technology for the preparation and application of cermet coatings and claddings in thermal power plants
Zongde LIU, Miao LIU, Liping ZHAO
期刊论文
Research on a quantificational method for chromatic-light emotions of architectural wall coatings in
Ting WANG, Ma JIAN, Gang LIU, Xiaoxi LIU, Mingyu ZHANG
期刊论文
A comprehensive assessment on the durability of gas diffusion electrode materials in PEM fuel cell stack
Arunkumar JAYAKUMAR
期刊论文
Passive convergence-permeable reactive barrier (PC-PRB): An effective configuration to enhance hydraulic
期刊论文
Coupled diffusion of chloride and other ions in saturated concrete
Nattapong DAMRONGWIRIYANUPAP, Linyuan LI, Yunping XI
期刊论文
Effects of additive NaI on electrodeposition of Al coatings in AlCl
Tianyu Yao, Haiyan Yang, Kui Wang, Haiyan Jiang, Xiao-Bo Chen, Hezhou Liu, Qudong Wang, Wenjiang Ding
期刊论文
Hydrogen production from methanol through dielectric barrier discharge
Baowei WANG, Xu ZHANG, Haiying BAI, Yijun Lü, Shuanghui HU
期刊论文