High Temperature Wear Behaviour of Nano/Micro Bplus-plus">4C Reinforced Aluminium Matrix Composites Fabricated by an Ultrasonic Cavitation-Assisted Solidification Process
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- 作者：R. Harichandran ; N. Selvakumar…
- 关键词：Metal matrix composite ; Micro and nano B4C particles ; Ultrasonic dispersion ; High temperature wear
- 刊名：Transactions of the Indian Institute of Metals
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：70
- 期：1
- 页码：17-29
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Metallic Materials; Materials Science, general; Tribology, Corrosion and Coatings;
- 出版者：Springer India
- ISSN：0975-1645
- 卷排序：70
文摘
The micro- and nano-composites containing 2, 4 and 6 by wt% of B4C particles in aluminium are fabricated using stir and ultrasonic cavitation-assisted casting processes. The fabricated composites are characterized by using scanning electron microscopy, X-ray diffractometer. The dry sliding wear behaviour of the prepared composites are investigated by using pin on disc method at an applied load of 4, 8, 12, 16 N for pin temperatures of 100 and 200 °C. The wear study at room temperature is also carried out for comparison. The investigations indicate that the wear resistance of the nano particle-reinforced composites are better than those of the micro B4C particle-reinforced composites under all loads and different temperatures. Analysis of wear surface and debris by scanning electron microscopy with energy dispersive X-ray diffractometer reveals the nature of wear mode of samples. It is also observed that the predominant wear mechanism for pure aluminium at 100 and 200 °C are adhesion and metal flow respectively, whereas for fabricated composites abrasion, delamination and oxidation are the most dominant wear mechanisms.