| Autor: |
Xiaozhou Cao, Chao Wang, Xiangxin Xue, Gongjin Cheng |
| Jazyk: |
angličtina |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
Archives of Metallurgy and Materials, Vol 60, Iss 4, Pp 2493-2498 (2015) |
| Druh dokumentu: |
article |
| ISSN: |
2300-1909 |
| DOI: |
10.1515/amm-2015-0404 |
| Popis: |
The effect of Ti addition on the residual Al content and mechanical properties of B4C-Al composites fabricated by vacuum infiltration was investigated in the present study. The B4C-Al composite materials were fabricated using [Ti+B4C] preforms preheated at 1700ºC for 1 h and Al alloys infiltrated in vacuum atmosphere at 1100ºC for 2 h. The phase composition indicated that TiB2 has high wettability to Al as a result of the preheating. SEM and EDX results revealed a number of Al dimples are on the fracture surface due to the existence of TiB2. When the content of added Ti increases to 30%, the [Ti+B4C] preform is characterized by a minimal porosity (33.11%) and a maximal density, a corresponding amount of residual Al of 33.11% and a minimal fracture toughness (5.03 MPa·m1/2) with a hardness of up to 63 HRC. The residual Al and the mechanical properties of the composite material preform were determined by the Ti content of the preform. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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