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Influence of NiCoCrAlY and Diffusion Aluminide Coating on Oxidation and Hot corrosion of a Ni-based Superalloy

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Influence of NiCoCrAlY and Diffusion Aluminide Coating on Ox...

Oxidation and Thermal Shock Behavior of a Glass-Alumina Composite Coating on K38G Superalloy at 1000℃

International Conference on Aerospace Materials(ICAM 2.06)

作者： Dongbai Xie, shenglong zhu, Wenjun Dai, fuhui Wang State {2. laboratory for corrosion and protection, institute of metal research, chinese academy of sciences, Wencui Road 62. shenyang 110016,China.

The most common metallic coatings used in today's gas turbine engines are MCrAlX (where M is Ni and/or Co and X is one or more reactive elements such as Y, Hf, etc.) type overlay coatings. However, overlay coating techniques (plasma and flame spraying or physical vapor deposition) are line-of-site processes, and so, it is possible not to deposit coating on some surface of the complex turbine components. The diffusion aluminide coatings can solve this problem. A NiCoCrAlY and diffusion aluminide coating were prepared on K38G cast alloy by multi-arc ion plating and low pressure chemical vapor deposition (LP-CVD) techniques, respectively. The isothermal oxidation behavior of K38G and the coatings was studied in air at 900 and 1000℃. Their hot {2. behaviors in the presence of 75 wt.% Na2.O4+K2.O4 and 75wt.%Na2.O4+NaCl film at 900℃ were studied. The results showed that the two kinds coatings exhibited low oxidation rate at 900 and 1000℃ and the presence of salt accelerated the oxidation rate. The NiCoCrAlY coating showed the better hot {2. resistance than the aluminide coating.

关键词： Aluminide coating, MCrAlX , Multi-arc ion plating, Isothermal oxidation, Hot corrosion.

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Journal of Materials Science & Technology 2012年第5期28卷 433-438页

作者： Minghui Chen Mingli Shen Xin Wang shenglong zhu {2. Wang State key laboratory for {2. and protection Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

The glass-alumina composite coatings were successfully prepared on the K38G superalloy *** isothermal oxidation and thermal shock behavior at 1000 ℃ were *** a post-annealing process at 850 ℃,the composite coatings possessed an improved protective effect for the alloy substrates from isothermal oxidation and a higher resistance to thermal *** from the glass matrix and interfacial reaction between the matrix and alumina inclusions,which caused the composites more refractory and tough,accounted for this *** micromechanisms for the formation of oxidation results of spinel ZnCr_2._4 were also discussed.

关键词： Micromechanics Glass-alumina Nickel based superalloys Oxidation Precipitation

Microstructure and cavitation erosion behavior of sputtered NiCrAlTi coatings with and without N incorporations

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Journal of Materials Science & Technology 2020年第19期54卷 211-222页

作者： Zhengliang Liu shenglong zhu Mingli Shen Yixuan Jia Wen Wang {2. Wang School of Materials Science and Engineering University of Science and Technology of Chin1Hefei 230000China corrosion and protection Division Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of SciencesShenyang 110016China corrosion and protection Division Shenyang National Laboratory for Materials ScienceSchool of Materials Science and EngineeringNortheastern University110819 ShenyangChina

The NiCrAlTi coatings free of N and with N incorporations were deposited on austenitic stainless steel304 L by magnetron sputtering in Ar and in gas mixture of Ar and N2.*** N incorporated in the coatings existed as nitride precipitates(from^3 vol.%to^17 vol.%)after vacuum *** the NiCrAlTi coatings,whatever free of N or with N incorporations,exhibited better resistance against cavitation erosion than ion plating Ti N coating and the substrate 304 L in ultrasonic cavitation *** NiCrAlTi coating free of N incorporation presents superior cavitation erosion ***,the nitrogen incorporation within the NiCrAlTi coatings showed negative effects on the resistance against cavitation erosion.

关键词： Cavitation erosion NiCrAlTi(N)coating Microstructure Nitride precipitate

Comparative study of mechanical and wear behavior of Cu/WS_2.composites fabricated by spark plasma sintering and hot pressing

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Journal of Materials Science & Technology 2017年第11期33卷 1416-1423页

作者： Qunchang Wang M inghui Chen Zhongmao Shan Chengguo Sui Lin zhang shenglong {2. fuhui Wang key laboratory for Anisotropy and Texture of Materials (Ministry of Education) School of Material Science and Engineering Northeastern UniversityShenvang 110819 China AVIC Chengdu Aircraft Design & research institute Chengdu 610041 China AVIC Chengdu Aircraft Industrial (Group) Co. Ltd Chengdu 610041 China laboratory for corrosion and {2. Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

The mechanical and wear behavior of copper-tungsten disulfide（Cu/WS_2. composites fabricated by spark plasma sintering（SPS） and hot pressing（HP） was investigated, comparatively. Results indicated that the addition of lubricant WS_2.substantially reduced wear rate of the Cu matrix composites fabricated by SPS,and the optimum content of WS_2.is 2. wt% with regard to the wear behavior. However, it affected a little to the wear rate while dramatically decreased the friction coefficient of the composite fabricated by *** difference in friction behavior of the self-lubricating composites fabricated by the two techniques was closely related to their different mechanical properties. Severe interfacial reaction occurred during spark plasma sintering, leading to brittle phase formation at interface.

关键词： metal-matrix composites(MMCs) Hardness Self-lubricating Spark plasma sintering Interfacial reaction

Enamel coating for protection of the 316 stainless steel against tribo-corrosion in molten zinc alloy at 460℃

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Journal of Materials Science & Technology 2021年第6期65卷 126-136页

作者： Zhongdi Yu Minghui Chen Jinlong Wang Fengjie Li shenglong zhu {2. Wang shenyang National laboratory for Materials Science Northeastern UniversityShenyang 110819China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China institute of metal {2. Chinese Academy of SciencesShenyang 110016China

Hot-dip galvanizing provides excellent corrosion and wear resistance for ***,the equipment itself,such as the steel roller,immerged in corrosive molten zinc suffers serious material loss during steel's *** protection has become the main technique problem in modern galvanizing *** this study,an enamel coating was designed and *** tribo-corrosion in molten zinc alloy(Zn-0.2.wt%Al)at 460℃was investigated in comparison with the traditional WC-12.Co composite coating and the 316 stainless *** indicate that the steel suffers serious material *** corrosion products of Fe_(2. Al_(5) Znx form at the worn surface and the wear scar has reached 2.0μm deep after merely 5 h *** the two coatings provide an improved tribo-corrosion resistance,for the WC-12.Co coating,its chemical reaction with the molten zinc increases brittleness and promotes *** synergistic wear and corrosion cause its *** enamel coating performs better during *** is chemically stable in molten zinc thus able to provide high corrosion *** addition,the amorphous[Si04]network and the self-lubricating CaF_(2. crystallite help it to build up an intact amorphous glaze layer readily at surface on sliding,leading to a reduced wear *** the whole tribo-corrosion process,the enamel coating is completely free of cracking,and the Zn penetration is inhibited.

关键词： Enamel coating High temperature corrosion Liquid alloy Corrosive wear

corrosion Behaviors of Nitride Coatings on Titanium Alloy in NaCl-Induced Hot corrosion

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Acta metallurgica Sinica(English Letters) 2021年第10期34卷 1434-1446页

作者： Mingming zhang Yipeng Feng Yahui Wang Yunsong Niu Li Xin Yongfeng Li Jianxiu Su shenglong {2. fuhui Wang School of Mechanical and Electrical Engineering Henan Institute of Science and TechnologyXinxiang 453003China corrosion and protection Division Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchShenyang 110016China corrosion and protection Division Shenyang National Laboratory for Materials ScienceNortheastern UniversityShenyang 110819China

TiN and TiAlN coatings were deposited by arc ion plating on titanium alloys to study their hot corrosion resistance when they were exposed to NaCl at 600℃.The microstructure and corrosion behaviors of nitride coatings were studied using scanning electron microscope,X-ray diffraction,electro-probe microanalyzer and X-ray photoelectron *** results showed that nitride coatings with the different compositions and the ones with the same composition but different thicknesses presented different hot corrosion *** and thin TiAlN coatings showed poor corrosion *** internal oxidation attacked the alloy *** corrosion products were mainly consisted of non-protective TiO2.and sodium *** contrast,the thick TiAlN coating presented outstanding corrosion *** sodium salt,the corrosion products were composed of protective Al_(2.O_(3).The increasing thickness of TiAlN significantly enhanced the hot corrosion *** corrosion mechanisms of alloy,TiN and TiAlN coatings were discussed in detail.

关键词： Titanium alloy Nitride Coating Hot corrosion resistance

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高温防护金属涂层的发展及活性元素效应

航空材料学报 2018年第2期38卷 21-31页

作者：鲍泽斌蒋成洋朱圣龙王福会中国科学院金属研究所沈阳材料科学国家研究中心腐蚀与防护研究部沈阳110016 东北大学沈阳材料科学国家研究中心腐蚀与防护研究部沈阳110819

高温防护涂层(一般为金属基)被广泛用于航空发动机和大型地面燃气轮机关键热端部件(例如涡轮叶片)的防护。通过生成一层致密且生长缓慢的氧化膜(Al_2._3,Cr_2._3或SiO_2.),这类涂层可以在高温下为基体合金提供可靠防护,以防止基体合金... 详细信息

高温防护涂层(一般为金属基)被广泛用于航空发动机和大型地面燃气轮机关键热端部件(例如涡轮叶片)的防护。通过生成一层致密且生长缓慢的氧化膜(Al_2._3,Cr_2._3或SiO_2.),这类涂层可以在高温下为基体合金提供可靠防护,以防止基体合金被快速氧化腐蚀侵害。本文回顾了高温防护金属黏结层的发展历程(以铝化物涂层和MCrAlY包覆涂层为例),其改进总是围绕着提高涂层中Al的浓度及合理分布,以及缓和涂层与基体合金的互扩散为目标;重点关注高温防护涂层中添加活性元素(RE)后引入的活性元素效应,包括活性元素被发现的历程、活性元素改性作用机制以及近期研究者在活性元素掺杂方面的工作进展。

关键词：铝化物涂层 MCrAlY包覆涂层高温氧化高温腐蚀活性元素效应

TiAl合金表面搪瓷基复合涂层与多弧离子镀NiCrAlY涂层的抗热腐蚀行为对比研究

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金属学报 2019年第2期55卷 229-237页

作者：廖依敏丰敏陈明辉耿哲刘阳王福会朱圣龙东北大学沈阳材料科学国家研究中心东北大学联合研究分部沈阳110819 苏州工业职业技术学院精密制造工程系苏州215104 中国科学院金属研究所沈阳110016

以Ti-45Al-2.n-2.b合金为基体,采用多弧离子镀制备NiCrAlY涂层、喷涂-烧结法制备搪瓷基复合涂层,对比研究了2.涂层以及合金基体的热腐蚀行为。热腐蚀实验温度为850℃,选用饱和盐溶液溶质成分为75%Na_2.O_4+2.%NaCl (质量分数),涂盐量为... 详细信息

以Ti-45Al-2.n-2.b合金为基体,采用多弧离子镀制备NiCrAlY涂层、喷涂-烧结法制备搪瓷基复合涂层,对比研究了2.涂层以及合金基体的热腐蚀行为。热腐蚀实验温度为850℃,选用饱和盐溶液溶质成分为75%Na_2.O_4+2.%NaCl (质量分数),涂盐量为1.5～2.5 mg/cm^2.研究结果表明,合金基体完全不具备抗热腐蚀能力,表面形成的氧化膜疏松多孔,且极易剥落;NiCrAlY涂层表面生成的保护性Al_2._3膜提高了合金的抗热腐蚀能力,然而涂层与基体间严重的互扩散及Al_2._3膜与熔盐的碱性溶解使得NiCrAlY涂层逐渐失效,热腐蚀60 h即出现氧化膜的剥落;而搪瓷基复合涂层在熔盐环境中只发生了轻微的物理溶解,具有极高的热稳定性及较低的热腐蚀速率,有效地阻隔了腐蚀性离子的入侵,抗热腐蚀性能优异。

关键词：搪瓷涂层热腐蚀 NiCrAlY涂层 TiAl合金

耐热镁合金Mg-14Gd-2.3Zn-Zr的高温氧化行为研究

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中国腐蚀与防护学报 2022年第1期42卷 73-78页

作者：邵银华王金龙张伟张甲李玲杜汐然陈明辉朱圣龙王福会沈阳材料科学国家研究中心东北大学联合研究分部沈阳110819 中国科学院金属研究所沈阳110016

研究了稀土耐热镁合金Mg-Gd-Zn-Zr在高温环境下的氧化行为,将Mg-14Gd-2.3Zn-Zr合金在2.0、300和440℃三组温度下进行恒温氧化实验,实验周期分别为2. h和50 min。采用X射线衍射仪、扫描电镜、扫描电镜能谱分析对镁合金表面氧化膜的微观... 详细信息

研究了稀土耐热镁合金Mg-Gd-Zn-Zr在高温环境下的氧化行为,将Mg-14Gd-2.3Zn-Zr合金在2.0、300和440℃三组温度下进行恒温氧化实验,实验周期分别为2. h和50 min。采用X射线衍射仪、扫描电镜、扫描电镜能谱分析对镁合金表面氧化膜的微观形貌以及物相组成进行分析。研究结果显示,镁合金经高温氧化后,氧化膜的主要物相组成为MgO,且随着氧化温度的升高,合金表层Gd的含量逐渐增加。在440℃时,氧化膜内层中较为连续致密的Gd_(2.O_(3)薄膜阻止了合金中Mg^(2.)的进一步消耗,从而提高了镁合金的抗氧化性能。

关键词：稀土耐热镁合金氧化性能氧化膜