CAJ | 학술논문

以Al2O3陶瓷球为对偶材料，借助UMT-2摩擦磨损试验机详细研究温度变化对复合材料干滑动摩擦磨损特性的影响，并用SEM、EDS、奥林巴斯激光共焦扫描显微镜分析铸态SiCp/A356复合材料的高温摩擦磨损行为。结果表明：复合材料的磨损率对温度变化很敏感，在200℃以下，磨损率及其变化较小，以氧化磨损机制为主，属于轻微磨损；当温度达到250℃及以上时，磨损率开始急剧上升，磨损表面出现严重塑性流动痕迹，磨损面上出现磨屑粘着堆积的凸起，同时形成大量的大尺寸的磨屑，此时以粘着磨损机制为主，同时存在少量的氧化磨损。氧化磨损阶段，摩擦因数虽有变化，但相对稳定；但粘着磨损阶段，摩擦因数变得极度不稳定，出现尖锐的峰值。
이Al2O3도자구위대우재료，차조UMT-2마찰마손시험궤상세연구온도변화대복합재료간활동마찰마손특성적영향，병용SEM、EDS、오림파사격광공초소묘현미경분석주태SiCp/A356복합재료적고온마찰마손행위。결과표명：복합재료적마손솔대온도변화흔민감，재200℃이하，마손솔급기변화교소，이양화마손궤제위주，속우경미마손；당온도체도250℃급이상시，마손솔개시급극상승，마손표면출현엄중소성류동흔적，마손면상출현마설점착퇴적적철기，동시형성대량적대척촌적마설，차시이점착마손궤제위주，동시존재소량적양화마손。양화마손계단，마찰인수수유변화，단상대은정；단점착마손계단，마찰인수변득겁도불은정，출현첨예적봉치。
The influence of temperature change on the dry sliding friction and wear characteristics of as-cast SiCp/A356 composite was investigated on UMT-2 tribometer by using Al2O3 ceramic ball as dual material. The high temperature friction and wear behavior of the composite material were analyzed by SEM, EDS and Olympus confocal laser scanning microscope. The results show that the wear rate of the composites is very sensitive to the change of temperature. When temperature is less than 200 ℃, the wear rate and its change are relatively smaller. The wear mechanism is mainly oxidation wear, which is one form of mild wear. When the temperature reaches or is above 250℃, the wear rate increases quickly. And on the wear surface, there are severe plastic flowing wear traces, the bulge of stacked swarf adhesion and a large number of large sized wear debris. The wear mechanism mainly is adhesive wear and there is a small amount of oxidation wear as well. At oxidation wear stage, although the friction coefficient changes, but it is relatively stable. While at adhesion wear stage, the friction coefficient becomes extremely unstable, and a sharp peak appears.