| Porous bulk metallic glass fabricated by powder hot pressing |
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| 引用本文： | Keqiang Qiu1),Bo Yu2),and Yinglei Ren1) 1) School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110023,China 2) Shenyang Research Institute of Foundry,Shenyang 110022,China. Porous bulk metallic glass fabricated by powder hot pressing[J]. 北京科技大学学报(英文版), 2007, 0(Z1) |
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| 作者姓名： | Keqiang Qiu1) Bo Yu2) and Yinglei Ren1) 1) School of Materials Science and Engineering Shenyang University of Technology Shenyang 110023 China 2) Shenyang Research Institute of Foundry Shenyang 110022 China |
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| 作者单位： | Keqiang Qiu1)，Bo Yu2)，and Yinglei Ren1) 1) School of Materials Science and Engineering，Shenyang University of Technology，Shenyang 110023，China 2) Shenyang Research Institute of Foundry，Shenyang 110022，China |
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| 基金项目： | This work was financially supported by the Fundamental Research Project of Shenyang Science and Technology Bureau, China (No. 061508). |
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| 摘 要： | A synthesis method for the production of porous bulk metallic glass (BMG) was introduced. This method utilizes the su- perplastic forming ability of amorphous powder in the supercooled liquid (SCL) state and intenerating salt mixture as a placeholder to produce BMG foam by using a hot die pressing method. Scanning electron microscope (SEM), X-ray diffraction (XRD) and dif- ferential scanning calorimetry (DSC) were employed to characterize the morphologies of foaming structure, the crystallization and the percentage of crystallization of the as-produced porous BMG. The results suggested that the formation of porous structure by su- perplastic forming process is feasible. Good bonding effect was observed between amorphous powder particles. Less than 6.5% of crystalline phases were formed during hot pressing, and less than 5.5% of residual salt was enclosed in the foam. To remove any re- sidual salt particles, salt preforms with three-dimensional network and good connectivity is necessary.
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Porous bulk metallic glass fabricated by powder hot pressing |
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| Keqiang Qiu),Bo Yu),and Yinglei Ren) ) School of Materials Science and Engineering,Shenyang University of Technology,Shenyang ,China ) Shenyang Research Institute of Foundry,Shenyang ,China. Porous bulk metallic glass fabricated by powder hot pressing[J]. Journal of University of Science and Technology Beijing, 2007, 0(Z1) |
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| Authors: | Keqiang Qiu) Bo Yu) and Yinglei Ren) ) School of Materials Science Engineering Shenyang University of Technology Shenyang China ) Shenyang Research Institute of Foundry Shenyang China |
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| Affiliation: | Keqiang Qiu1),Bo Yu2),and Yinglei Ren1) 1) School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110023,China 2) Shenyang Research Institute of Foundry,Shenyang 110022,China |
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| Abstract: | A synthesis method for the production of porous bulk metallic glass (BMG) was introduced. This method utilizes the su- perplastic forming ability of amorphous powder in the supercooled liquid (SCL) state and intenerating salt mixture as a placeholder to produce BMG foam by using a hot die pressing method. Scanning electron microscope (SEM), X-ray diffraction (XRD) and dif- ferential scanning calorimetry (DSC) were employed to characterize the morphologies of foaming structure, the crystallization and the percentage of crystallization of the as-produced porous BMG. The results suggested that the formation of porous structure by su- perplastic forming process is feasible. Good bonding effect was observed between amorphous powder particles. Less than 6.5% of crystalline phases were formed during hot pressing, and less than 5.5% of residual salt was enclosed in the foam. To remove any re- sidual salt particles, salt preforms with three-dimensional network and good connectivity is necessary. |
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| Keywords: | porous bulk metallic glass hot pressing placeholders superplastic forming |
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