The Sticking Out Mechanism and Growth of TiB Whiskers from TiBw/Ti-6Al-4V Composites during Sintering
The process of TiB whiskers (TiBw) squeezed out and the growth of sticking out TiBw were investigated in TiBw/Ti-6Al-4V composites via adding 5 vol% TiB<sub>2</sub> powders. TiB<sub>2</sub> distributed along the surface of Ti-6Al-4V powders by low energy milling, resulted in...
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| Format: | Article |
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MDPI AG
2020-11-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/11/1467 |
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| author | Guorong Cui Bo Yang Jiabin Hou Wenzhen Chen Wencong Zhang |
| author_facet | Guorong Cui Bo Yang Jiabin Hou Wenzhen Chen Wencong Zhang |
| author_sort | Guorong Cui |
| collection | DOAJ |
| description | The process of TiB whiskers (TiBw) squeezed out and the growth of sticking out TiBw were investigated in TiBw/Ti-6Al-4V composites via adding 5 vol% TiB<sub>2</sub> powders. TiB<sub>2</sub> distributed along the surface of Ti-6Al-4V powders by low energy milling, resulted in the enrichment region of B and Ti elements. During sintering, TiBw nucleated and grew along the [010] direction with the diffusion of B and Ti atoms in the enrichment region. Due to larger thermal expansion ratio of TiBw, the TiBw were squeezed out from the Ti matrix, and the sticking out TiBw grew gradually with the diffusion of B and Ti atoms from the enrichment region. Because of the high interfacial strength between TiBw and Ti matrix, the matrix adhered to TiBw, and hindered the squeezing out of TiBw. Eventually, the cone TiBw stuck out the Ti matrix, and the other end of TiBw pinned in Ti matrix. Moreover, the diameter of TiBw near surface between TiB<sub>2</sub> and Ti matrix was larger than other areas, resulting from the high concentration of B and Ti atoms. The solubilized B atoms near TiBw were absorbed by TiBw, which was considered as the other B source of TiBw. |
| first_indexed | 2024-03-10T15:07:14Z |
| format | Article |
| id | doaj.art-9b056621ac6b494cb1d112ad26d8c35f |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T15:07:14Z |
| publishDate | 2020-11-01 |
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| series | Metals |
| spelling | doaj.art-9b056621ac6b494cb1d112ad26d8c35f2023-11-20T19:42:18ZengMDPI AGMetals2075-47012020-11-011011146710.3390/met10111467The Sticking Out Mechanism and Growth of TiB Whiskers from TiBw/Ti-6Al-4V Composites during SinteringGuorong Cui0Bo Yang1Jiabin Hou2Wenzhen Chen3Wencong Zhang4School of Materials Science and Engineering, Harbin Institute of Technology, Weihai 264209, ChinaSchool of Materials Science and Engineering, Harbin Institute of Technology, Weihai 264209, ChinaSchool of Materials Science and Engineering, Harbin Institute of Technology, Weihai 264209, ChinaSchool of Materials Science and Engineering, Harbin Institute of Technology, Weihai 264209, ChinaSchool of Materials Science and Engineering, Harbin Institute of Technology, Weihai 264209, ChinaThe process of TiB whiskers (TiBw) squeezed out and the growth of sticking out TiBw were investigated in TiBw/Ti-6Al-4V composites via adding 5 vol% TiB<sub>2</sub> powders. TiB<sub>2</sub> distributed along the surface of Ti-6Al-4V powders by low energy milling, resulted in the enrichment region of B and Ti elements. During sintering, TiBw nucleated and grew along the [010] direction with the diffusion of B and Ti atoms in the enrichment region. Due to larger thermal expansion ratio of TiBw, the TiBw were squeezed out from the Ti matrix, and the sticking out TiBw grew gradually with the diffusion of B and Ti atoms from the enrichment region. Because of the high interfacial strength between TiBw and Ti matrix, the matrix adhered to TiBw, and hindered the squeezing out of TiBw. Eventually, the cone TiBw stuck out the Ti matrix, and the other end of TiBw pinned in Ti matrix. Moreover, the diameter of TiBw near surface between TiB<sub>2</sub> and Ti matrix was larger than other areas, resulting from the high concentration of B and Ti atoms. The solubilized B atoms near TiBw were absorbed by TiBw, which was considered as the other B source of TiBw.https://www.mdpi.com/2075-4701/10/11/1467TiB whiskerssqueezed outsticking outenrichment regionthermal expansion ratio |
| spellingShingle | Guorong Cui Bo Yang Jiabin Hou Wenzhen Chen Wencong Zhang The Sticking Out Mechanism and Growth of TiB Whiskers from TiBw/Ti-6Al-4V Composites during Sintering Metals TiB whiskers squeezed out sticking out enrichment region thermal expansion ratio |
| title | The Sticking Out Mechanism and Growth of TiB Whiskers from TiBw/Ti-6Al-4V Composites during Sintering |
| title_full | The Sticking Out Mechanism and Growth of TiB Whiskers from TiBw/Ti-6Al-4V Composites during Sintering |
| title_fullStr | The Sticking Out Mechanism and Growth of TiB Whiskers from TiBw/Ti-6Al-4V Composites during Sintering |
| title_full_unstemmed | The Sticking Out Mechanism and Growth of TiB Whiskers from TiBw/Ti-6Al-4V Composites during Sintering |
| title_short | The Sticking Out Mechanism and Growth of TiB Whiskers from TiBw/Ti-6Al-4V Composites during Sintering |
| title_sort | sticking out mechanism and growth of tib whiskers from tibw ti 6al 4v composites during sintering |
| topic | TiB whiskers squeezed out sticking out enrichment region thermal expansion ratio |
| url | https://www.mdpi.com/2075-4701/10/11/1467 |
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