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Добірка наукової літератури з теми "NiAl-Al2O3"

Автор: Grafiati
Опубліковано: 14 липня 2022

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Статті в журналах з теми "NiAl-Al2O3"

1

Hwang, Chii-Shyang, and Tien-Jui Liu. "Microstructure and mechanical properties of NiAl/Al2O3 composites." Journal of Materials Research 14, no. 1 (1999): 75–82. http://dx.doi.org/10.1557/jmr.1999.0013.

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Анотація:
To improve mechanical properties of NiAl, a method for making NiAl matrix composites containing oxide ceramics is introduced. The method involves oxidation of NiAl powder in air to form a thin and uniform oxide scale, mainly Al2O3, on the NiAl particles. The Al2O3 contents increase with increasing oxidation temperature. The NiAl/Al2O3 composites are then formed by hot-pressing the oxidized NiAl powder under vacuum atmosphere. Al2O3 inhibits the grain growth of NiAl during the hot-pressing. The residual stress and the Ni-rich NiAl composition exist in the hot-pressed NiAl/Al2O3 composites. Stre
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2

Davies, I. J., G. Pezzotti, A. Bellosi, D. Sciti, and S. Guicciardi. "Mechanical Behaviour of Nickel Aluminide Reinforced Alumina (AL2O3-NiAl) Composites." Advanced Composites Letters 11, no. 6 (2002): 096369350201100. http://dx.doi.org/10.1177/096369350201100601.

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Анотація:
The microstructure and mechanical properties of hot-pressed alumina (Al2O3) matrix composites containing 20, 35, or 50 vol% of nickel aluminide (NiAl) were investigated. The mean Al2O3 grain size was found to decrease from approximately 2.0 μm (monolithic Al2O3) to 1.0 μm for the composite containing 50 vol% NiAl. Composite flexural strength values were lower than both the monolithic Al2O3 and NiAl and attributed to the weakly bonded NiAl particles acting as flaw origins. In contrast to this, the fracture toughness increased with NiAl volume fraction to a maximum of 4.90 MPa·m1/2, thus confirm
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3

Konopka, Katarzyna, Marek Krasnowski, Justyna Zygmuntowicz, Konrad Cymerman, Marcin Wachowski, and Paulina Piotrkiewicz. "Characterization of Al2O3 Samples and NiAl–Al2O3 Composite Consolidated by Pulse Plasma Sintering." Materials 14, no. 12 (2021): 3398. http://dx.doi.org/10.3390/ma14123398.

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Анотація:
The paper describes an investigation of Al2O3 samples and NiAl–Al2O3 composites consolidated by pulse plasma sintering (PPS). In the experiment, several methods were used to determine the properties and microstructure of the raw Al2O3 powder, NiAl–Al2O3 powder after mechanical alloying, and samples obtained via the PPS. The microstructural investigation of the alumina and composite properties involves scanning electron microscopy (SEM) analysis and X-ray diffraction (XRD). The relative densities were investigated with helium pycnometer and Archimedes method measurements. Microhardness analysis
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4

Afandi, N. F., Abreeza Manap, Halina Misran, S. Z. Othman, and N. I. M. Pauzi. "Characterizations of NiAl-Al2O3 Produced Using Gel Combustion Synthesis Method." Applied Mechanics and Materials 761 (May 2015): 457–61. http://dx.doi.org/10.4028/www.scientific.net/amm.761.457.

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Анотація:
NiAl is widely used for elevated temperature application because it gives better properties, especially in the gas turbine application. This study was done in order to investigate the effects of calcination temperature on NiAl and α-Al2O3 formation using gel combustion synthesis method. This method used fatty alcohol and fatty acid ester for producing NiAl powders. X-Ray diffraction patterns of calcined samples exhibited NiAl and α-Al2O3 at temperature 1050°C. Therefore, nanostructured NiAl-α- Al2O3 can be successfully produced with the gel combustion method using less expensive and more envir
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5

Zhang, X. J., and Yan Niu. "Oxidation of Four NiAl-Ag Alloys at 900°C in 1 Atm O2." Materials Science Forum 475-479 (January 2005): 775–78. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.775.

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Анотація:
Small amounts of silver have been added to the intermetallic compound β-NiAl for the purpose of improving its mechanical properties. Four ternary NiAl-Ag alloys NiAl-0.5Ag, NiAl-1Ag, NiAl-5Ag and NiAl-10Ag (at.%), and an Ag-free β-NiAl have been oxidized at 900oC for 24 h in 1 atm O2 to study the effect of the presence of silver on the oxidation of β-NiAl. The kinetics of all the alloys were generally composed of two main parabolic stages with slightly larger parabolic rate constants for the second stage, except for NiAl-10Ag, which has an instantaneous parabolic rate constant decreasing with
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6

Zygmuntowicz, Justyna, Katarzyna Konopka, Marek Krasnowski, et al. "Characterization of Al2O3 Matrix Composites Fabricated via the Slip Casting Method Using NiAl-Al2O3 Composite Powder." Materials 15, no. 8 (2022): 2920. http://dx.doi.org/10.3390/ma15082920.

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Анотація:
This work aimed to characterize Al2O3 matrix composites fabricated by the slip casting method using NiAl-Al2O3 composite powder as the initial powder. The composite powder, consisting of NiAl + 30 wt.% Al2O3, was obtained by mechanical alloying of Al2O3, Al, and Ni powders. The composite powder was added to the Al2O3 powder to prepare the final powder for the slip casting method. The stained composite samples presented high density. EDX and XRD analyses showed that the sintering process of the samples in an air atmosphere caused the formation of the NiAl2O4 spinel phase. Finally, the phase com
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7

Chmielewski, M., S. Nosewicz, K. Pietrzak, et al. "Sintering Behavior and Mechanical Properties of NiAl, Al2O3, and NiAl-Al2O3 Composites." Journal of Materials Engineering and Performance 23, no. 11 (2014): 3875–86. http://dx.doi.org/10.1007/s11665-014-1189-z.

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8

Konopka, Katarzyna, Justyna Zygmuntowicz, Marek Krasnowski, Konrad Cymerman, Marcin Wachowski, and Paulina Piotrkiewicz. "Pulse Plasma Sintering of NiAl-Al2O3 Composite Powder Produced by Mechanical Alloying with Contribution of Nanometric Al2O3 Powder." Materials 15, no. 2 (2022): 407. http://dx.doi.org/10.3390/ma15020407.

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Анотація:
NiAl-Al2O3 composites, fabricated from the prepared composite powders by mechanical alloying and then consolidated by pulse plasma sintering, were presented. The use of nanometric alumina powder for reinforcement of a synthetized intermetallic matrix was the innovative concept of this work. Moreover, this is the first reported attempt to use the Pulse Plasma Sintering (PPS) method to consolidate composite powder with the contribution of nanometric alumina powder. The composite powders consisting of the intermetallic phase NiAl and Al2O3 were prepared by mechanical alloying from powder mixtures
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9

Lee, W. Y., Y. W. Bae, and K. L. More. "Synthesis of functionally graded metal-ceramic microstructures by chemical vapor deposition." Journal of Materials Research 10, no. 12 (1995): 3000–3002. http://dx.doi.org/10.1557/jmr.1995.3000.

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Анотація:
A composite microstructure consisting of small α-Al2O3 particles dispersed in a β-NiAl coating matrix was synthesized by chemical vapor deposition (CVD). White the surface of a pure Ni substrate was being reacted with AlCl3 and H2 to form β-NiAl at a temperature of 1050 °C, the partial pressure of CO2 in the reactor was controlled via pulsing to nucleate and disperse 50 to 500 nm α-Al2O3 particles in the β-NiAl matrix. The relative amount of the α-Al2O3 phase increased with coating thickness as the rate of the β-NiAl formation decreased with time. These experimental observations suggest that t
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10

Ramdan, Raden Dadan, Budi Prawara, and Rochim Suratman. "Thermal Oxidation of NiAl-Al2O3 Coated on Mild Carbon Steel." Advanced Materials Research 488-489 (March 2012): 437–41. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.437.

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Анотація:
Thermal oxidation is believed as an important phenomenon that naturally occurs on material subjected to elevated temperature such as NiAl-Al2O3 coated material. In the present study, thermal oxidation on this coated layer was prepared by heating processes of NiAl-Al2O3 coated on mild carbon steel. Deposition of NiAl-Al2O3 was performed by high-velocity oxy fuel (HVOF) process, whereas subsequent heating processes were performed at 3 different temperatures 600oC, 800oC and 1000oC. After the process, the effects of this thermal oxidation process on the phases formation, microstructure and qualit
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Дисертації з теми "NiAl-Al2O3"

1

Bihr, Jean-Claude. "Le Matériau composite NiAl-Al2O3." Phd thesis, Université Sciences et Technologies - Bordeaux I, 1996. http://tel.archives-ouvertes.fr/tel-00149385.

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Анотація:
Les industries aéronautiques tentent de mettre au point de nouvelles structures plus résistantes et surtout réutilisables en vue d'accélérer la conquête de l'espace. A cet effet, le matériau composite à matrice intermétallique NiAl renforcée par des fibres longues d'alumine semble prometteur et adapté à ces applications. Les travaux présentés concernent a la fois l' élaboration du composite par infiltration liquide sous pression de gaz et l'étude du couplage fibre-matrice (F/M), phénomène prépondérant qui gouverne les caractéristiques macroscopiques du matériau. Le couplage a été étudié par le
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2

Zhong, Yunlong [Verfasser]. "Interface Structure, Interface Properties and Tensile Properties of Single Crystalline Al2O3 Fiber Reinforced NiAl and IP75 Matrix Composites / Yunlong Zhong." Aachen : Shaker, 2008. http://d-nb.info/1164341332/34.

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3

Troncy, Romain. "Synthesis and high-temperature behavior of self-restoring coatings." Thesis, La Rochelle, 2021. http://www.theses.fr/2021LAROS034.

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Анотація:
La sélection des matériaux utilisés dans les parties chaudes des moteurs aéronautiques ou dans les centrales de production d’énergie est devenue un enjeu crucial au vu des impératifs écologiques et économiques. L’un des composants critiques de ces systèmes sont les aubes de turbine dont la tenue mécanique est assurée par la nature des substrats employés (aciers et superalliages à base nickel). Cependant, leur tenue environnementale nécessite l’application de revêtements protecteurs source d’Al capables de former de barrières d’oxyde (Al2O3) imperméables à l’attaque externe par oxydation et cor
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4

Tyler, Samson. "Modelling the Effects of Element Doping and Temperature Cycling on the Fracture Toughness of β-NiAl / α-Al2O3 Interfaces in Gas Turbine Engines". Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/23685.

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Анотація:
This document describes work performed related to the determination of how elemental additions affect the interfacial fracture toughness of thermal barrier coatings at the bond coat/thermally grown oxide interface in gas turbines. These turbines are exposed to cyclical thermal loading, therefore a simulation was designed to model this interface in a temperature cycle between 200 K and 1000 K that included oxide growth between 2 μm and 27 μm. The fracture toughness of this interface was then determined to elucidate the function of elemental additions. It was shown that minimal concentrations of
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5

Shih-Kai, Weng, and 翁勢凱. "Wear Resistance of NiAl/Al2O3 Composites." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/17950341821774896099.

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Анотація:
碩士<br>國立臺灣大學<br>材料科學與工程學研究所<br>88<br>The objective of this work is to study the sliding wear behavior of NiAl/Al2O3 composites. The composites were prepared by hot-pressing in vacuum. The NiAl/Al2O3 composites were then brazed onto a AISI 1045 carbon steel in vacuum to enhance the heat relief produced during wear test. Dry pin-on-wheel wear test were conducted, SKD11 and diamond wheels are used as contact surface materials. The wear behavior and the work hardening on the surface were investigated. The result shows that the wear mechanisms against SKD11 wheel are dominated by abrasi
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6

TSAI, CHEN-HUNG, and 蔡政宏. "Mechanical properties of Al2O3/NiAl composite." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/71565420473299278700.

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碩士<br>國立臺灣大學<br>機械工程學系<br>85<br>Structural ceramic (also named Engineering ceramic) is a newly developedmaterial. Compared with metal for structure, it demonstrates manyexcellent physical and mechanical properties. Such as low density, lowcoefficient of expansion,low heat transfer coefficient, high Young'smodulus, high hardness, high compress strength, and good corrosion, oxidization,and creep resistance. Howrver, extreme brittleness is the primany obstacleto its application in engineering.
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Chen, Yi-Ren, and 陳怡仁. "Preparation and oxidation behavior of NiAL/Al2O3 composites." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/47330474327285717727.

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Анотація:
碩士<br>國立成功大學<br>材料科學(工程)學系<br>86<br>NiAl介金屬化合物與其他超合金相比較，具有低密度、高融點、高強度 以及較佳的抗氧化性等優點，因此成為航太工業上深具潛力的結構材料。 前人曾利用粉末預先氧化方法與控制晶粒大小的方法製成NiAl/Al2O3複合 材料，該複合材料具有優於NiAl者的機械性質與高溫強度。為繼續瞭解 NiAl材料及NiAl/Al2O3複合材料在高溫時的氧化行為，本研究利用前述二 種方法製成NiAl/Al2O3複合材料，檢討預先氧化的溫度和晶粒的尺寸對於 該材料在1000℃/24h長時間高溫氧化的影響。 本研究主要以熱重分析儀 （Thermogravimetric analyzer，TGA）進行實驗，以檢測試樣在高溫氧 化時之重量增加量與增重的速率，來評定該試樣的抗氧化性質是否良好。 實驗結果顯示，NiAl/Al2O3複合材料的高溫氧化行為可分為二階段進行： 氧化開始後的十小時間，NiAl/Al2O3複合材料表面形成氧化膜的速率（即
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YANG, Shyh-Chyi, and 楊士奇. "High Temperature Mechanical Properties of NiAl/Al2O3 Composites." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/64590805629751039863.

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Анотація:
碩士<br>國立成功大學<br>材料科學(工程)學系<br>85<br>NiAl介金屬化合物具有高熔點、高楊氏係數、低密度及高抗氧化的特 性，使其在航太工業之高溫應用上，足以取代傳統的鎳基及鈦基超合金而 成為深具發展潛力的材料。但是，NiAl亦有室溫脆性及高溫強度不足的缺 點。為改善NiAl的性能，以往的研究中有以預先氧化法將Al2O3添加於 NiAl中，而提升了NiAl的室溫機械性質。甚至藉由控制NiAl基材的晶粒尺 寸，更進一步提升此NiAl/Al2O3複材的機械性質。為進一步瞭解此NiAl/ Al2O3複合材之高溫機械性質，本實驗吾人繼續採用預先氧化法，先調製 出NiAl/Al2O3粉末再將之熱壓燒結緻密後，分別以壓縮測試法及單邊缺口 誶法(SENB)檢討了NiAl/Al2O3複合燒結體的高溫壓縮強度與韌性。 實 驗結果顯示：含有16.5 vol%Al2O3之NiAl/Al2O3複合燒結體在600, 800及1000 K的0.2%應變量之壓縮應力值分別為867, 678及36
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9

Hsu, Hsin-Chung, and 許信忠. "Growth of C60 thin-film on Al2O3/NiAl(100) and Au-Pt bimetallic clusters on Al2O3/NiAl(100) exposed to methanol." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/53861004915873516283.

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碩士<br>國立中央大學<br>物理研究所<br>100<br>We present a scanning tunneling microscopy study of C60 films grown on Al2O3/NiAl(100) under ultrahigh vacuum conditions. The C60 islands formed on the crystalline Al2O3 have rectangular shapes whereas those on the amorphous area have irregular shapes, resembling those on NiAl(100). The long side of the C60 rectangular islands was along the direction of protrusions, which are along two directions ([001] and [010] of NiAl(100)) and perpendicular to each other.. Increasing the C60 coverage, layer-by-layer grown was found to dominate the growth. On the grown C60 fi
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10

Gu, Don-Lin, and 古東林. "Microstructure and Mechanical Properties of the NiAl/Al2O3 composites." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/06479379492601697733.

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碩士<br>國立成功大學<br>材料科學及工程學系<br>87<br>The intermetallic compound NiAl has potentials as a high temperature structural material because of its high melting point, low density, and excellent oxidation resistance. However, some disadvantages of NiAl which needs solving are brittleness at room temperature and low creep resistance. To improve the mechanical properties of NiAl, adding second phase to from intermetallic matrix composites is a practicable direction . It has been reported on "Pre-Oxidation Method", which shows NiAl/Al2O3 composites have better room temperature mechanical properties than t
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Частини книг з теми "NiAl-Al2O3"

1

Hwang, C. S., T. J. Liu, and J. P. Shich. "Metal Oxidation Process : NiAl/Al2O3 Composites." In Multiphased Ceramic Materials. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-642-18752-0_10.

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2

Hu, Weiping, Keyun Wen, Hao Chen, Stepan Kyrsta, and Günter Gottstein. "Untersuchungen zu chemischer Stabilität, Grenzflächenstruktur und Debonding-Verhalten der von kontinuierlichen Al2O3-Fasern verstärkten NiAl-Verbundwerkstoffe." In Verbundwerkstoffe. Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/9783527609017.ch23.

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Тези доповідей конференцій з теми "NiAl-Al2O3"

1

Liu, Dawei, Tong Zhou, Yan Wang, and Jinping Suo. "Design, Optimization and Performance Testing of Self-Healing Tritium Permeation Barriers." In 2014 22nd International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icone22-30678.

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Анотація:
Tritium permeation barriers (TPBs) are essential to reduce the tritium permeation through blanket structural materials and cooling tubes. The pores and cracks are the most important problem of thermally sprayed TPBs. Irradiation swelling is another serious problem in NiAl which used as adhesive layer in traditional Al2O3 coatings. A self-healing coating TiC+mixture (TiC/Al2O3)+Al2O3 without NiAl had been designed and manufactured by our group. It can cure 90% porosity after a certain heat treatment under normal atmosphere. The adhesive strength is as good as the traditional coating NiAl+Al2O3.
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2

Afandi, N. F., A. Manap, S. N. A. Yusof, et al. "Effect of calcination time on NiAl-Al2O3 using gel combustion synthesis method." In PROCEEDINGS OF THE 23RD SCIENTIFIC CONFERENCE OF MICROSCOPY SOCIETY MALAYSIA (SCMSM 2014). AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4919180.

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3

Hearley, J. A., J. A. Little, and A. J. Sturgeon. "Oxidation Properties of NIAI Intermetallic Coatings Prepared by High Velocity Oxy-Fuel Thermal Spraying." In ITSC 1998, edited by Christian Coddet. ASM International, 1998. http://dx.doi.org/10.31399/asm.cp.itsc1998p0089.

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Анотація:
Abstract A reaction-formed NiAl intermetallic compound (IMC) powder has been deposited as a coating onto low carbon steel test coupons by the High Velocity Oxy-Fuel (HVOF) process using both gaseous and liquid fuels. The microstructure of this coating has been examined using scanning electron microscopy and x-ray diffraction and was found to depend on spraying conditions. Oxidation tests on the coating in air, between the temperatures of 800°C-1200°C, revealed that an α-alumina (Al2O3) scale formed on the coating's surface. At 1200°C, a nickel spinel (NiO/NiAl2O4) and haematite (Fe2O3) phases
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4

OLESZAK, D., and A. OLSZYNA. "CRYSTALLITE SIZE AND LATTICE STRAIN DETERMINATION OF NIAL-AL2O3 NANOCOMPOSITE OBTAINED BY REACTIVE MILLING." In Proceedings of the XIX Conference. WORLD SCIENTIFIC, 2004. http://dx.doi.org/10.1142/9789812702913_0008.

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5

Page, Richard A., and Gerald R. Leverant. "Inhibition of Interdiffusion From MCrAlY Overlay Coatings by Application of a Ni-Re Interlayer." In ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/98-gt-375.

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The durability of protective coatings on combustion turbine blades and vanes is a critical issue in the power generation industry. Coating life usually dictates the refurbishment intervals for these components, and these intervals have generally been of shorter duration than desired by the operators of the equipment. Both MCrAlY and aluminide type coatings protect against oxidation and hot corrosion by forming a protective Al2O3 surface layer. Degradation of the coatings occurs by depletion of the aluminum content of the coating through interdiffusion with the substrate and through the formati
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6

Nylén, P., J. Wigren, J. Idetjärn, L. Pejryd, M. Friis, and P. Moretto. "On-Line Microstructure and Property Control of a Thermal Sprayed Abrasive Coating." In ITSC2001, edited by Christopher C. Berndt, Khiam A. Khor, and Erich F. Lugscheider. ASM International, 2001. http://dx.doi.org/10.31399/asm.cp.itsc2001p1213.

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Анотація:
Abstract A process control tool has been developed for air plasma spraying of a NiAl (bond coat) and Al2O3 (top coat) coating systems. The process is employed at Volvo Aero Corporation for abrasive purposes, such as knife-edge applications on compressor parts. In-flight particle temperatures, velocities and diameters were measured by the DPV2000 system. Several samples were sprayed and the coating microstructures were evaluated using Image Analysis techniques on optical and scanning electron microscope images. Top and bond coat thickness, oxides, porosity, grit blast residues, delaminations, s
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