CAJ | 학술논문

制备粗糙层热解炭(RL)和光滑层热解炭(SL)基体的C/C复合材料,测试该C/C复合材料与40Cr钢配副时的摩擦磨损行为,并对磨损表面进行SEM观察.对比研究高强石墨和光滑层结构的块状热解炭在相同条件下的滑动摩擦磨损行为.结果表明:PAN炭纤维改善C/C复合材料的摩擦磨损行为;在实验载荷范围内,与高强度石墨材料相比,含RL炭C/C复合材料的摩擦因数降低0.08～0.12;体积磨损量增幅降低;与热解炭试样相比,具有SL炭C/C复合材料的摩擦因数降低0.02～0.05,体积磨损量低0.2 mm~3左右;随着时间的延长,大部分C/C复合材料的摩擦因数基本相对稳定或呈小幅下降,而石墨、热解炭块的摩擦因数均呈不同幅度的上升;具有RL炭的C/C复合材料摩擦表面膜厚度随载荷增加而降低,具有SL炭的C/C复合材料摩擦表面较粗糙;高强石墨能形成较完整致密的摩擦膜,但磨粒磨损严重,磨屑易在摩擦膜边缘形成层状堆积;热解炭块摩擦表面磨屑堆积松散,有较多的孔洞以及热解炭层整体剥落的形貌.
제비조조층열해탄(RL)화광활층열해탄(SL)기체적C/C복합재료,측시해C/C복합재료여40Cr강배부시적마찰마손행위,병대마손표면진행SEM관찰.대비연구고강석묵화광활층결구적괴상열해탄재상동조건하적활동마찰마손행위.결과표명:PAN탄섬유개선C/C복합재료적마찰마손행위;재실험재하범위내,여고강도석묵재료상비,함RL탄C/C복합재료적마찰인수강저0.08～0.12;체적마손량증폭강저;여열해탄시양상비,구유SL탄C/C복합재료적마찰인수강저0.02～0.05,체적마손량저0.2 mm~3좌우;수착시간적연장,대부분C/C복합재료적마찰인수기본상대은정혹정소폭하강,이석묵、열해탄괴적마찰인수균정불동폭도적상승;구유RL탄적C/C복합재료마찰표면막후도수재하증가이강저,구유SL탄적C/C복합재료마찰표면교조조;고강석묵능형성교완정치밀적마찰막,단마립마손엄중,마설역재마찰막변연형성층상퇴적;열해탄괴마찰표면마설퇴적송산,유교다적공동이급열해탄층정체박락적형모.
Two kinds of C/C composites with rough-lamination pyrocarbon matrix (RL) or smooth lamination (SL) pyrocarbon matrix were prepared. The sliding friction behaviors against 40Cr steel ring of the two C/C composites, a high strength graphite and a pyrocarbon solid material with SL structure used as compared material were investigated. The wear surface of the samples were observed by SEM. The results show that the PAN-carbon fiber can improve the frictional stability of C/C composites. Compared with the graphite, the coefficients of friction (COF) of the RL-C/C are lower under the same load of about 0.08-0.12, and the increasing range of the volume losses are still lower than those of the graphite. Compared with the SL pyrocarbon material, the COF and the volume loss of the SL-C/C are about 0.02-0.05 and 0.2 mm~3, lower than those under the same load. The COFs of most RL-C/C and SL-C/C specimens remain stable or decrease slightly with time, while those of the graphite and pyrocarbon specimens increase. The thickness of the integrated friction film of the RL-C/C decreases with load, but the wear surface of the SL-C/C is rough. Tough the wear surface of the graphite is integrated, the serious abrasive wear make the debris move easily and accumulate on the edge of the wear trace to form a restacked morphology. On the wear surface of the pyrocarbon material, some loosed debris, circular worn holes and flake worn out pyrocarbon has been found.