摘要
采用高压低温SPS烧结的新工艺制备了高硬度高电导率的CuCr25/石墨烯复合材料。X射线衍射(XRD)和拉曼分析(Raman)揭示石墨烯在新合金的制备过程中并未变性亦无新相产生,利用扫描电镜(SEM)以及能谱仪(EDS)进行形貌分析显示石墨烯在新合金中分散均匀。性能测试结果显示,在600℃,300 MPa条件下经SPS烧结后制得的CuCr25/石墨烯合金,与对比试验中采用相同工艺制得的未添加石墨烯的CuCr25合金相比,硬度提高了11.3%,电导率下降了4.2%;而与传统工艺制备的CuCr25合金相比,其电导率和硬度则分别提高了35%和48%,表明成分和工艺的改进对性能的提高均有贡献。
Novel graphene reinforced CuCr25 matrix composites（GCMC） with high hardness and conductivity were prepared by spark plasma sintering（SPS） under high pressure and low temperature after low speed ball-milling mix.It is confirmed that the graphene remains and no new phase is found by X-ray diffraction and Raman spectroscopy.Structural characterization of GCMC was performed using field emission scanning electron microscope（SEM） and energy dispersive spectroscopy（EDS）.The results show that the graphene is homogeneously distributed in matrix after the sintering process.The hardness of GCMC with 1 wt% graphene sintered under 300 MPa and 600°C is increased by 11.3% compared with that of CuCr25 alloys fabricated by the same method,though its conductivity is decreased by 4.2%.Compared with the CuCr25 alloys consolidated by the conventional method,the conductivity and hardness of the new-type GCMC are about 1.35 and 1.48 times higher,respectively,which indicates that the additional phase and new process all make contributions to the enhancement of GCMC.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2017年第12期3862-3867,共6页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51403223)
