Importance of chamber gas pressure on processing of Al-based metallic glasses during melt spinning
The effect of chamber gas pressure on the amorphicity of Al85Ni5Y10 alloy was studied for the melt-spinning process. The amorphicity of as-quenched ribbons was characterized by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The chamber atmosphere pressure is crucial to the cool...
| Main Authors: | , , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2011
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/94361 http://hdl.handle.net/10220/7287 |
| _version_ | 1826111276006244352 |
|---|---|
| author | Yang, Hongwang Wang, R. C. Yuan, X. G. Li, R. D. Wang, J. Q. Tan, Ming Jen |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Yang, Hongwang Wang, R. C. Yuan, X. G. Li, R. D. Wang, J. Q. Tan, Ming Jen |
| author_sort | Yang, Hongwang |
| collection | NTU |
| description | The effect of chamber gas pressure on the amorphicity of Al85Ni5Y10 alloy was studied for the melt-spinning process. The amorphicity of as-quenched ribbons was characterized by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The chamber atmosphere pressure is crucial to the cooling rate of melt spinning. At high vacuum, at pressure less than 0.001 atm, fully crystalline fragments are obtained. Monolithic amorphous ribbons were only obtained at a gas pressure of 0.1 atm, 0.2 atm or higher. The extended contact length between ribbons and the copper wheel contributes to the high cooling rate of melt spinning in Al-based glass forming alloys; that is supported by images recorded by a high-speed camera. Higher chamber pressure increases contact length between ribbons and the wheel, which is qualitatively elucidated by Bernoulli's equation. |
| first_indexed | 2024-10-01T02:48:01Z |
| format | Journal Article |
| id | ntu-10356/94361 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:48:01Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | ntu-10356/943612023-03-04T17:18:24Z Importance of chamber gas pressure on processing of Al-based metallic glasses during melt spinning Yang, Hongwang Wang, R. C. Yuan, X. G. Li, R. D. Wang, J. Q. Tan, Ming Jen School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering::Fluid mechanics The effect of chamber gas pressure on the amorphicity of Al85Ni5Y10 alloy was studied for the melt-spinning process. The amorphicity of as-quenched ribbons was characterized by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The chamber atmosphere pressure is crucial to the cooling rate of melt spinning. At high vacuum, at pressure less than 0.001 atm, fully crystalline fragments are obtained. Monolithic amorphous ribbons were only obtained at a gas pressure of 0.1 atm, 0.2 atm or higher. The extended contact length between ribbons and the copper wheel contributes to the high cooling rate of melt spinning in Al-based glass forming alloys; that is supported by images recorded by a high-speed camera. Higher chamber pressure increases contact length between ribbons and the wheel, which is qualitatively elucidated by Bernoulli's equation. Accepted version 2011-10-17T06:40:46Z 2019-12-06T18:54:53Z 2011-10-17T06:40:46Z 2019-12-06T18:54:53Z 2011 2011 Journal Article Yang, H. W., Wang, R. C., Yuan, X. G., Li, R. D., Wang, J. Q., & Tan, M. J. (2011). Importance of chamber gas pressure on processing of Al-based metallic glasses during melt spinning. Philosophical Magazine Letters, 91(10), 656-663. 0950-0839 https://hdl.handle.net/10356/94361 http://hdl.handle.net/10220/7287 10.1080/09500839.2011.604356 en Philosophical magazine letters © 2011 Taylor & Francis. This is the author created version of a work that has been peer reviewed and accepted for publication by Philosophical Magazine Letters, Taylor & Francis. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1080/09500839.2011.604356 ]. 10 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Mechanical engineering::Fluid mechanics Yang, Hongwang Wang, R. C. Yuan, X. G. Li, R. D. Wang, J. Q. Tan, Ming Jen Importance of chamber gas pressure on processing of Al-based metallic glasses during melt spinning |
| title | Importance of chamber gas pressure on processing of Al-based metallic glasses during melt spinning |
| title_full | Importance of chamber gas pressure on processing of Al-based metallic glasses during melt spinning |
| title_fullStr | Importance of chamber gas pressure on processing of Al-based metallic glasses during melt spinning |
| title_full_unstemmed | Importance of chamber gas pressure on processing of Al-based metallic glasses during melt spinning |
| title_short | Importance of chamber gas pressure on processing of Al-based metallic glasses during melt spinning |
| title_sort | importance of chamber gas pressure on processing of al based metallic glasses during melt spinning |
| topic | DRNTU::Engineering::Mechanical engineering::Fluid mechanics |
| url | https://hdl.handle.net/10356/94361 http://hdl.handle.net/10220/7287 |
| work_keys_str_mv | AT yanghongwang importanceofchambergaspressureonprocessingofalbasedmetallicglassesduringmeltspinning AT wangrc importanceofchambergaspressureonprocessingofalbasedmetallicglassesduringmeltspinning AT yuanxg importanceofchambergaspressureonprocessingofalbasedmetallicglassesduringmeltspinning AT lird importanceofchambergaspressureonprocessingofalbasedmetallicglassesduringmeltspinning AT wangjq importanceofchambergaspressureonprocessingofalbasedmetallicglassesduringmeltspinning AT tanmingjen importanceofchambergaspressureonprocessingofalbasedmetallicglassesduringmeltspinning |