Microstructures and Dry Sliding Wear Properties of ZrB_2/A356 Composites Synthesized by Magneto-chem

• 作 者: 陈登斌 赵玉涛 ZHU Haiyan CHEN Gang
• 机 构: School of Materials Science and Engineering, Jiangsu University,Silicon Lake College,
• 出 处: Journal of Wuhan University of Technology(Materials Science
• 发表日期: 2013年02期
• 关键词: sliding reinforcement spherical magneto reinforced abrasive adding graphite inor

In situ A356-x%PVF (particle volume fraction) ZrB2 ( x=1, 3, 5) composites were prepared via magneto-chemistry in situ reaction and the dry sliding wear properties of the composites were investigated. The experimental results show that ZrB2 reinforcement particle is obtained and its morphology mainly present in spherical and regular hexagon. Wear test results show that the values of wear weight loss of the composites decrease with the increase of value under a given sliding time and a certain load of 60 N. Especially, when x=5, the weight loss of the as-prepared composite is 43.1 mg, which is only 36.4% to that of A356 alloy, 118 mg. The wear mechanism is changed from adhesion wear to adhesion wear and abrasive wear and then to abrasive wear with the increase of x value.

In situ A356-x% PVF (particle volume fraction) ZrB2 (x = 1, 3, 5) composites were prepared via magneto-chemistry in situ reaction and the dry sliding wear properties of the composites were. The experimental results show that ZrB2 reinforcement particle is obtained and its morphology primarily present in spherical and regular hexagon. Wear test results show that the values ​​of wear weight loss of the composites decrease with the increase of value under a given sliding time and a certain load of 60 N. Especially, when x = 5, the weight loss of the as-prepared composite is 43.1 mg, which is only 36.4% to that of A356 alloy, 118 mg. The wear mechanism is changed from adhesion wear to adhesion wear and abrasive wear and then to abrasive wear with the increase of x value.