CAJ | 학술논문

采用大气等离子体喷涂技术制备了ZrC涂层，表征了涂层的显微结构和基本性能。采用球-盘接触方式，以WC-Co硬质合金球为对磨球研究了ZrC涂层在不同载荷下的磨损性能，同时，与常用的Al2O3耐磨涂层进行了比较。结果表明：ZrC涂层主要由立方相ZrC组成，存在部分因氧化而生成的四方相ZrO2。5～30N低载荷条件下，ZrC涂层的稳定摩擦系数低于Al2O3涂层；40～60N高载荷条件下，ZrC涂层的稳定摩擦系数略高于Al2O3涂层。不论低载荷条件还是高载荷条件下，ZrC涂层的体积磨损率均低于Al2O3涂层。载荷较低时，ZrC涂层的磨损失效形式主要为疲劳剥落和颗粒拔出；在高载荷条件下，发生对磨球的物质转移，ZrC涂层的磨损失效形式以转移膜磨损和犁削为主。
채용대기등리자체분도기술제비료ZrC도층，표정료도층적현미결구화기본성능。채용구-반접촉방식，이WC-Co경질합금구위대마구연구료ZrC도층재불동재하하적마손성능，동시，여상용적Al2O3내마도층진행료비교。결과표명：ZrC도층주요유립방상ZrC조성，존재부분인양화이생성적사방상ZrO2。5～30N저재하조건하，ZrC도층적은정마찰계수저우Al2O3도층；40～60N고재하조건하，ZrC도층적은정마찰계수략고우Al2O3도층。불론저재하조건환시고재하조건하，ZrC도층적체적마손솔균저우Al2O3도층。재하교저시，ZrC도층적마손실효형식주요위피로박락화과립발출；재고재하조건하，발생대마구적물질전이，ZrC도층적마손실효형식이전이막마손화리삭위주。
ZrC coating was fabricated by atmospheric plasma spray(APS) and its microstructure and some basic properties were characterized. The tribological property of ZrC coating against WC-Co alloy was evaluated by sliding wear test using ball-on-disk contact configuration. Al2O3 coating was employed as comparison in the tribological evaluation. The results showed that ZrC coating was mainly composed of cubic ZrC and some content of tetragonal ZrO2.The coefficient of friction of ZrC coating is lower than Al2O3 coating within a load range of 5N to 30N and is higher than Al2O3 coating with loads of 40N,50N and 60N. The volume wear rate of ZrC coating is lower than Al2O3 coating under full range of loads. The observation of worn surface indicated that the dominant wear failure mechanism of ZrC coating was fatigue flaking off and particles pulling out under low load, while the wear failure mechanism of ZrC coating became ploughing effect under high load.