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Дисертації з теми "Ni/Al2O3 composite"

Автор: Grafiati

Опубліковано: 7 червня 2025

Оновлено: 2 серпня 2025

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1

MOTTA, MARCELO SENNA. "IN-SITU REDUCTION SYNTHESIS AND MICROSTRUCTURAL CHARACTERIZATION OF CU-AL2O3 E NI-AL2O3 NANO-COMPOSITES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2003. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=4062@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Os compósitos Cu-Al2O3 possuem excelente resistência a recozimentos em altas temperaturas bem como altas condutividades térmica e elétrica. Uma dispersão nanométrica uniforme de partículas cerâmicas na matriz metálica confere características únicas ao material, possibilitando a sua utilização como, por exemplo, resfriadores ativos. Por outro lado, estas propriedades são essencialmente dependentes da microestrutura do material, que por sua vez, varia de acordo com o método de preparação adotado. Os principais objetivos do

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2

Spirandeli, Bruno Roberto. "Influência da adição de NbC e Al2O3+TiO2 nos desempenhos de revestimentos a base de Ni-Al produzidos por aspersão térmica." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18158/tde-12032015-151858/.

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Aspersão térmica é um processo de produção de revestimentos metálicos, poliméricos, cerâmicos ou compósitos sobre superfícies previamente preparadas que objetiva na maioria das vezes a prevenção contra o desgaste e/ou corrosão e também a recuperação dimensional de superfícies desgastadas. Ligas de Ni-Al são extensivamente empregadas na aspersão térmica para reconstrução dimensional e como camada de ligação como materiais que não se ligam adequadamente à superfície a ser revestida. A baixa dureza e resistência ao desgaste (principalmente em aplicações de reconstrução dimensional) desta liga pod

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3

Zhang, Yi Ming, and 張益銘. "The synthesis of nanocrystalline Ni/Al2O3 composite." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/83176553047560916007.

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4

Chen, Rong-Zhi, and 陳榮志. "Effect of Interface on Mechanical Properties of Al2O3/Ni Composite." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/72347465249897395299.

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5

Chenn, Yu-Hen, та 諶昱涵. "Synthesis of Nano-Sized α-Al2O3/Ni Core-Shell Composite Powders". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/883f47.

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碩士<br>國立臺北科技大學<br>材料及資源工程系所<br>93<br>In this study, the coating of Ni on the fine α-Al2O3 (<200nm) surface was performed using chemical reducing process. The processing conditions such as pH value , temperature , concentration of metal salt precursor , and response time were optimized though analyzing the characteristic of coating layer. A typical procedure was as follows: NiCl2．6H2O in water solution was added to α-Al2O3 suspension . The suspension was then mechanical stirred and adjusted the pH to 11 , at temperature of 80℃ for 30 min , then carry on every physical and chemical analyses , i

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6

Jlang, an-zhou, and 江安洲. "The study of Al2O3-Black Ni solar spectrallyselective composite absorbers manufactured byelectroless composite coating technology." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/4e4b4m.

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碩士<br>國立虎尾科技大學<br>材料科學與綠色能源工程研究所<br>97<br>The metal-dielectric composite spectrally selective solar absorbers were widely used in solar thermal collectors due to its excellent absorption. The manufacture cost of the metal-dielectric composite spectrally selective solar absorbers is expensive and that limits its applications. In this work, the electroless composite coating technology which possesses lower cost, simple equipment and easy to operate characteristics was used to fabricate the Al2O3-black nickel composite solar selective surface on Al substrate and the Sol-gel technique was used to

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Hsu, Che-Yuan, and 許哲源. "The study of Ni-Al2O3 solar spectally selective composite absorbers manufactured by electroless composite coating technology." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/s5k465.

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碩士<br>國立虎尾科技大學<br>材料科學與綠色能源工程研究所<br>96<br>In this work, the metal-dielectric composite (Ni-Al2O3) solar spectally selective absorbers have been deposited on aluminum substrate using the electroless composite coating technology and the antireflection layers for the absorbers were fabricated by sol-gel method. The effects of the size and content of dielectric (Al2O3), the thickness of absorber, the double absorption layer and the antireflection layer on the absorbance (α) and thermal emittance (ε) of Ni-Al2O3 composite solar selective absorber were studied. The surface morphology of absorber and

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8

Wang, Pei-Lun, and 王培倫. "Synthesis of Carbon Nanofibers with Specific Microstructures by a Ni/Al2O3 Composite Catalyst." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/10591902911446511381.

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博士<br>大同大學<br>材料工程學系(所)<br>93<br>Carbon nanofibers (CNFs) were synthesized by a chemical vapor deposition method with a Ni/Al2O3 composite catalyst. CNFs with specific structures, including the herringbone, short internal cavities, extended internal cavities and bamboo-like structure, can be synthesized at different synthetic temperatures. The gas feed can modify the synthetic temperature. The maximum growth temperature for CNFs with a CH4/N2 feed is 873 K and with a CH4/H2 feed is 973 K. The cause of formation of CNFs with internal cavities is considered to be the quasi-liquid state of cataly

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9

Pei-Lun, Wang, and 王培倫. "Synthesis of Carbon Nanofibers with Specific Microstructures by a Ni/Al2O3 Composite Catalyst." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/10721643541112799327.

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博士<br>大同大學<br>材料工程研究所<br>93<br>Carbon nanofibers (CNFs) were synthesized by a chemical vapor deposition method with a Ni/Al2O3 composite catalyst. CNFs with specific structures, including the herringbone, short internal cavities, extended internal cavities and bamboo-like structure, can be synthesized at different synthetic temperatures. The gas feed can modify the synthetic temperature. The maximum growth temperature for CNFs with a CH4/N2 feed is 873 K and with a CH4/H2 feed is 973 K. The cause of formation of CNFs with internal cavities is considered to be the quasi-liquid state of catalyst

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10

翁嘉豪. "The study of kinetic mechanism and the electroforming application of ni/al2o3 composite coating." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/06215016395627959255.

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碩士<br>國立勤益技術學院<br>化工與材料工程系<br>93<br>The nano- Ni-Al2O3 composite coating can be used in special working situation of MEMS. However, the Al2O3 particles aggregate in the Ni-Al2O3 composite coating easily. The welled-dispersion of particles is more important to obtain a fine electrodepositing composite coating. It could enhance the amounts of Al2O3 particles in the deposited layer which reducing the concentration of electrolyte to assist the dispersion of particles. Finally, the hardness of composite coating is elevated by adding the Al2O3 nano-particles into the bath under the concentration of

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11

Hsieh, Pei-Huan, and 謝培煥. "The Effect of the Plating Conditions of Ni-Al2O3 Composite on the Deposit Properties." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/5er2rf.

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碩士<br>國立成功大學<br>化學工程學系碩博士班<br>90<br>Composite coating developed to meet the requirement of serious environment in industry is more suitable than simplex coating. Method used to fabricate the composite coating by electrodeposition is called composite electrodeposition. The papers and patents concerning with composite electrodeposition gradually increase in recent years due to the advantage of simplicity and economy. This technology has been widely used in industry. Ni-Al2O3 composite coating manufactured by composite electro-deposition has the properties for wear resistance and anti-corrosio

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12

Tseng, Shih-hua, and 曾士華. "Study on the electrodeposition method for Ni-based composite layer coating SiC and Al2O3 particles." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/26446305601851175619.

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碩士<br>國立中山大學<br>機械與機電工程學系研究所<br>98<br>Abstract In the study, amounts of ceramic particles in coating layer deposited on the surface of cathode specimen are investigated under two kinds of ceramic particles of Al2O3 and SiC mixed in the Nickel sulfate bath during electroplating or electrophoretic depositing process. According to the IEP of the particles, Al2O3 particles which showed the positive charge in the nickel sulfate bath are deposited onto the work-piece of cathode during electrophoretic deposition (EPD)process. And the other hand, SiC particles which showed Neutral ( or zero ) charge i

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13

Gu, Lu-Rong, та 古祿榮. "Preparation of Nanosized α-Al2O3/Ni-P Core-Shell Composite Powders by Electroless Plating Method". Thesis, 2007. http://ndltd.ncl.edu.tw/handle/q35d38.

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碩士<br>國立臺北科技大學<br>材料科學與工程研究所<br>95<br>Synthesis of nanosized α-Al2O3/Ni-P core-shell composite powders by electroless plating method was investigated in this study. The synthetic core-shell composite powders could be applied in catalysis field. The experimental results showed that the Na2C4H4O4•6H2O as a complexing agent in the electroless bath, the electroless plating occurred at high temperature (70oC), and the deposition particles formed aggregate and the size larger than 100 nm which was due to the higher reaction rate. The reaction temperature could be lower to about 45oC if Na3C6H5O7•2H2

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14

Lee, Chang-Hong, and 李建弘. "A Study of treatment the simultaneous AO7、Pb+2 and HSeO3- in Solution by Composite Fe-Ni/ CNTs and Fe-Ni/Al2O3." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/81837151601271314563.

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碩士<br>國立雲林科技大學<br>環境與安全工程系碩士班<br>97<br>In view of water pollutants becoming more complex, how to effectively treat anions and cations pollutants had attract more attentions.This research used the aluminum oxide and nano carbon tube (CNT) as carriers particles and used redox method to deposit nano iron-nickel form composite materials. This study used Orthogonal Experimental Design (OED) and Analysis of Variance (ANOVA) to design the test for treating dye AO7, HSeO3- and Pb+2. The OED included seven dependent factors of adsorbent type, amount of Fe-Ni, solution pH , AO7 concentrations, Pb+2 conc

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Chin, Shu-Chen, and 秦淑珍. "Research on the Wear Corrosion Characterization of 7075 High Strength Aluminum Alloy Surface Electroplating Ni-P-Al2O3 Nano-particles Composite Coatings." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/99199272317344172981.

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碩士<br>清雲科技大學<br>機械工程研究所<br>95<br>This thesis uses electroplating process to prepare Ni-P-Al2O3 composite coating on 7075 Aluminum Alloy surface by means of adding different concentrations of alumina powder (0 g/L to 50 g/L) to Ni plating solution, analysis mechanical properties in addition to evaluate the corrosion and wear-corrosion resistance of electroplating Ni-P-Al2O3 composite coating in 3.5% NaCl solution, also discussing with related micro-structural analysis results. Experimental results indicated that electroplating Ni-P-Al2O3 composite coating high hardness and wear-corrosion resist

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Wang, Te-Chun, and 王德純. "The Oxidation Behaviors of Al2O3/Ni and Al2O3/(ZrO2+Ni) Composites." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/27001791456788964204.

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碩士<br>國立臺灣大學<br>材料科學與工程學研究所<br>89<br>In the present study, the oxidation behavior of Al2O3/Ni and Al2O3/(ZrO2+Ni) composites are investigated. The composites are prepared by pressureless sintering in CO. For the oxidation of Al2O3/Ni composites, nickel diffuses outward and oxygen diffuses inward, a dense spinel layer is formed inside surface. The oxidation is divided into two stages: (1) the diffusion of nickel in the alumina grain boundary to control the oxidation at lower temperature (1000-1100oC). (2) The diffusion of oxygen in NiAl2O4 layer to control the oxidation at higher temperature (1

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Chen, Hsien-Kuan, and 陳憲冠. "The mechanical properties and oxidation behavior of Al2O3/Ni composites." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/09516491561520593402.

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碩士<br>國立臺灣大學<br>材料科學與工程學研究所<br>87<br>The Al2O3/Ni composite powder is prepared by an ion-exchange method. The surface of alumina can be covered uniformly with fine metallic nickel particles. The size of the metallic nickel particle is below 60 nm. After pressureless sintering in CO atmosphere, the Al2O3/Ni composites are prepared. The grain growth of matrix is inhibited and the density of the composites is decreased due to the presence of nickel inclusions. The flexural strength of composites is enhanced by the refinement of microstructure. The fracture toughness of composites is enhanced by

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