【摘要】 利用金属气相真空电弧(MEVVA)法对由电弧熔炼、喷铸法制备的大块Fe基非晶Fe41Co7Cr15Mo14C15B6Y2进行Co离子注入,注入剂量为3×1017ion/cm2。利用纳米压入法表征了离子注入对铁基非晶力学性能的影响,采用SRV球-盘式高温摩擦磨损试验机进行干摩擦磨损试验,分析了离子注入和晶化处理对Fe基大块非晶摩擦磨损性能的影响。利用形貌仪测定磨痕横截面形貌,SEM观察磨损表面形貌,EDS进行成分分析。结果表明,对非晶进行离子注入后,硬度从15GPa提高到了21GPa,弹性模量从230GPa提高到了290GPa;离子注入和晶化处理后抗磨损性能得到了很大的提高;铁基非晶磨损机理以脆性剥落为主,同时伴随着氧化磨损;而经离子注入后,脆性剥落块明显减小,晶化后的磨损机理主要是硬质相从非晶基体中剥离。更多还原

【Abstract】 Cobalt ions were implanted into Fe-based amorphous alloys Fe41Co7Cr15Mo14C15B6Y2 by metal vapor vacuum arc(MEVVA)with the total dose of 3×1017 ion/cm2.The nano-indentation method was employed to characterize the influence of ion implantation on mechanical properties of the Fe-based amorphous alloys.The wear and friction properties of the cast,implanted and devitrified amorphous alloys were assessed by ball-on-disc friction high temperature tester and wear test carried out under dry sliding condition.The surface morphology was observed by SEM,the composition was analyzed by EDS,and the cross section topography was measured by topographic meter.The results show that after Co ion implantation,the hardness increases from 15 GPa to 21GPa and the elastic modulus from 190 GPa to 230 GPa;the wear resistance property is improved by ion implantation and devitrification.The wear mechanism was mainly brittle exfoliation accompanied with oxidization.Ion implantation can impede brittle spalling because of the hardness increases.The strip of the hard phases was the main cause of the wear of the devitrified amorphous alloys.更多还原