共查询到20条相似文献,搜索用时 0 毫秒
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Yoshihiko Hangai Hayato Matsushita Shinji Koyama Ryosuke Suzuki Masaaki Matsubara 《Metallurgical and Materials Transactions A》2017,48(7):3161-3163
A preliminary study of the reproducibility of aluminum foam was performed. Aluminum foam was fabricated by a sintering and dissolution process. It was found that aluminum foam containing a blowing agent can be fabricated without the decomposition of the blowing agent, namely, the densified aluminum foam can be used as a foamable precursor for refoaming. By heat treatment of the densified aluminum foam containing the blowing agent, pores were reproduced in the aluminum. 相似文献
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Yoshihiko Hangai Yutaro Oba Shinji Koyama Takao Utsunomiya 《Metallurgical and Materials Transactions A》2011,42(12):3585-3589
Functionally graded (FG) aluminum foam consisting of A1050 and A6061 aluminum alloy was fabricated by using friction stir
processing (FSP). The fabrication of the precursor and the bonding of the A1050 precursor to the A6061 precursor can both
be conducted by FSP. According to the results of point analysis, the Mg content gradually changed in the bonding region, and
it was shown that seamless FG aluminum foam can be fabricated by the FSP route. 相似文献
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Yoshihiko Hangai Hiroki Ikeda Kenji Amagai Ryosuke Suzuki Masaaki Matsubara Nobuhiro Yoshikawa 《Metallurgical and Materials Transactions A》2018,49(10):4452-4455
Two-layered aluminum foam having layers with both closed-cell and open-cell pores was fabricated using the precursor foaming process and the sintering dissolution process. It was found that a two-layered Al foam with different pore structures but similar compression properties in each layer can be obtained. This foam is expected to have a region with superior thermal insulation and a region with superior heat release properties. 相似文献
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Yoshihiko Hangai Shinji Koyama Makoto Hasegawa Takao Utsunomiya 《Metallurgical and Materials Transactions A》2010,41(9):2184-2186
Aluminum foam/dense steel composites were fabricated by friction stir welding (FSW). It is expected that both mixing a blowing
agent into aluminum and bonding the aluminum precursor to steel can be conducted simultaneously by FSW. It was shown that
although heat treatment of the precursor evolved a brittle intermetallic compound layer, the bonding strength of the interface
consisting of the intermetallic compound layer was relatively high compared with the fracture strength of the aluminum foam
itself. 相似文献
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Metallurgist - This paper presents the results of studying the production of molybdenum-tungsten alloys by spark plasma sintering at various process conditions, as well as the processes of material... 相似文献
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M. Sankar R. G. Baligidad Shivkumar Khaple V. V. Satya Prasad V. V. Bhanu Prasad 《Transactions of the Indian Institute of Metals》2012,65(5):467-472
Niobium consumable electrodes of 10?mm dia?×?50?mm length were prepared by cold isostaic pressing with compaction pressure of 125?C250?MPa. The compacts were sintered under vacuum at different temperatures in the range of 1000?C1800?oC. The CIPed and sintered electrodes were characterized with respect to chemical analysis, density, microstructure and bend strength. The results showed that there is a marginal improvement in density at a sintering temperature in the range of 1000?C1400?oC, while a significant improvement in density was observed at sintering temperature in the range of 1600?C1800?oC. The bend strength of sintered electrode was found to increase with increasing sintering temperature and that attains a highest value at a sintering temperature in the range of 1600?C1800?oC. Sintering at a temperature higher than 1400?oC leads to decrease in oxygen content of the electrodes. The oxygen content was decreased from 2000 to 500?ppm when electrode was sintered at 1800?oC. 相似文献
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以空气雾化的A1Si12合金粉、镁粉和氢化钛粉末为原料,采用包套轧制法成功制备出了泡沫铝三明治板材.利用300 dpi扫描仪、扫描电镜(SEM)和显微硬度仪等检测方法系统比较了复合轧制和包套轧制方法对制备前驱体的宏观形貌和界面结合及其泡孔结构的影响,结果表明:包套轧制可以有效阻止面板材料裂纹的扩展,获得完整的和致密度均匀的预制坯,并能实现面板芯材的有效结合,最终获得泡孔结构完整和均匀的泡沫铝三明治板. 相似文献
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Closed-cell type barrier ribs such as meander, honeycomb, SDR, and waffle types were produced using capillary molding process. Sintering of the ribs revealed that the ribs with asymmetric geometry such as meander and SDR type became distorted severely by the sintering process, but the ribs with symmetric geometry such as honeycomb and waffle type maintained their green state morphology. After sintering, the ribs were coated with green phosphor using osmosis coating process and its luminance characteristics were evaluated. The results indicated that the luminance and its efficiency is improved by using closed-cell type ribs with the new phosphor forming technology. 相似文献
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