Effect of Ti addition on the wettability of Al–B 4 C metal matrix composites

✍ Scribed by Kocaefe, Duygu; Sarkar, Arunima; Chen, X-Grant

• Book ID: 126693225
• Publisher: Carl Hanser Verlag
• Year: 2012
• Tongue: English
• Weight: 506 KB
• Volume: 103
• Category: Article
• ISSN: 1862-5282
• DOI: 10.3139/146.110655

✦ Synopsis

Effect of Ti addition on the wettability of Al-B 4 C metal matrix composites

In this study, the wettability of B 4 C by molten Al, as well as Al -Ti alloys, with different Ti contents has been studied using the sessile-drop method. In general, the contact angle decreases with increasing temperature and time. The results show that an appropriate amount of Ti addition improves the wettability of B 4 C by Al. Analyses of the interfaces of solidified drops revealed that Al 3 BC and AlB 2 particles form around the B 4 C particles when they are in contact with pure Al. However, when Ti is added to Al, AlB 2 particles disappear and a new Ti-rich layer composed of TiB 2 particles forms around B 4 C surfaces. In addition, the effect of Ti addition on the surface tension of aluminum has also been examined.