硫酸钙晶须改性双马来酰亚胺树脂摩擦磨损性能的研究

STUDY OF CALCIUM SULPHATE WHISKERS MODIFIED BISMALEIMIDE RESIN BY FRICTION AND WEAR PROPERTIES

研究了载荷、偶联剂及硫酸钙晶须用量对双马来酰亚胺树脂摩擦磨损性能的影响及材料的磨损机制.结果表明,当摩擦载荷较大时,树脂基体在摩擦过程中出现明显的塑性变形和裂纹,而经过硫酸钙晶须改性的复合材料体系则塑性变形和裂纹情况得到明显的改善,并且磨损量显著降低.载荷从200 N增大到300 N后,树脂基体的磨损机制从粘着磨损过渡为严重的疲劳磨损,添加晶须体系仍以粘着磨损为主.晶须添加量较小时,复合材料的磨损机理主要为粘着磨损,晶须添加量较高时,磨粒磨损占主导地位.

The friction and wear behaviors of calcium sulphate whiskers modified bismaleimide resin under different friction load, coupling agent, and whisker content were investigated. The results show that the resin matrix exhibits adhesion wear under lower friction load, but it shows serious plastic distortion and crack under high friction load. The properties of composites with calcium sulphate whisker are improved obviously. The wear rates of the composites are decreased markedly by adding calcium sulphate whiskers. When friction load increases from 200 N to 300 N, the wear of the resin matrix is changed from an adhesion wear to a fatigue one. At lower whisker contents, the wear of the composites shows adhesion features. While at higher whisker contents, it is dominated by particle wear.