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The study of in-situ formed alumina ...
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Yu, Peng.
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The study of in-situ formed alumina and aluminide intermetallic reinforced aluminum-based metal matrix composites.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
The study of in-situ formed alumina and aluminide intermetallic reinforced aluminum-based metal matrix composites./
作者:
Yu, Peng.
面頁冊數:
116 p.
附註:
Source: Dissertation Abstracts International, Volume: 64-11, Section: B, page: 5729.
Contained By:
Dissertation Abstracts International64-11B.
標題:
Engineering, Materials Science. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3113442
The study of in-situ formed alumina and aluminide intermetallic reinforced aluminum-based metal matrix composites.
Yu, Peng.
The study of in-situ formed alumina and aluminide intermetallic reinforced aluminum-based metal matrix composites.
- 116 p.
Source: Dissertation Abstracts International, Volume: 64-11, Section: B, page: 5729.
Thesis (Ph.D.)--Chinese University of Hong Kong (People's Republic of China), 2004.
Aluminum-based metal matrix composites (MMCs) have been widely used as structural materials in the automobile and aerospace industry due to their specific properties. In this thesis, we report the fabrication of in-situ formed alumina and aluminide intermetallic reinforced aluminum-based metal matrix composites by the displacement reactions between Al and selected metal oxides (NiO, CuO and ZnO). These MMCs were produced when the Al-20wt% NiO, Al-20wt% CuO and Al-10wt% ZnO green compacts were reaction sintered in the tube furnaces.Subjects--Topical Terms:
1017759
Engineering, Materials Science.
The study of in-situ formed alumina and aluminide intermetallic reinforced aluminum-based metal matrix composites.
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Source: Dissertation Abstracts International, Volume: 64-11, Section: B, page: 5729.
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Thesis (Ph.D.)--Chinese University of Hong Kong (People's Republic of China), 2004.
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Aluminum-based metal matrix composites (MMCs) have been widely used as structural materials in the automobile and aerospace industry due to their specific properties. In this thesis, we report the fabrication of in-situ formed alumina and aluminide intermetallic reinforced aluminum-based metal matrix composites by the displacement reactions between Al and selected metal oxides (NiO, CuO and ZnO). These MMCs were produced when the Al-20wt% NiO, Al-20wt% CuO and Al-10wt% ZnO green compacts were reaction sintered in the tube furnaces.
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$a
In this work, differential thermal analysis (DTA) was performed on the green samples. The green samples were then sintered separately in different tube furnaces for 30 minutes. In order to study the reaction mechanisms, the x-ray diffractometry (XRD) was used to obtain diffraction patterns of these sintered samples, the scanning electron microscope (SEM) and transmission electron microscope (TEM) were used to study the microstructures of these samples. The elemental quantitative compositions of samples were determined by the energy dispersive x-ray spectrometry (EDX). In order to study the effect of cooling rate on the samples, the green samples were further sintered to 1000°C and cooled down to room temperature in different conditions: by furnace-cooling, air-quenching, oil-quenching or NaCl-solution-quenching. The SEM, TEM and atomic force microscopy (AFM) were conducted to investigate their microstructures. A microhardness tester was used to measure the hardness values of these samples.
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It was found that during sintering of the Al-20wt% NiO green sample, displacement reaction between Al and NiO initially occurred in solid-solid form and was soon halted by its products that separated the NiO particles from the Al matrix. The reaction then resumed in solid-liquid form as the temperature increased to the eutectic temperature of Al3Ni-Al when liquid (Al, Ni) phase appeared in the sample. After cooling, Al2O 3 particles, Al3Ni proeutectic phase and fiber-like Al 3Ni-Al eutectic were found in the sintered Al-MMC sample. (Abstract shortened by UMI.)
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