Synergetic effect of nano-carbon and HBN on microstructure and mechanical properties of Cu/Ti3SiC2/C nanocomposites

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:755

Article

Shu, Rui^1,2  Jiang, Xiaosong^1,2  Liu, Wanxia^1,2  Shao, Zhenyi^1,2  Song, Tingfeng³  Luo, Zhiping⁴ 

[1] Minist Educ, Key Lab Adv Technol Mat, Chengdu 610031, Sichuan, Peoples R China

[2] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Chengdu 610031, Sichuan, Peoples R China

[3] CSIC, Inst Ciencia Mat Barcelona ICMAB, Campus UAB, Barcelona 08193, Spain

[4] Fayetteville State Univ, Dept Chem & Phys, Fayetteville, NC 28301 USA

关键词: MWCNTs;    Graphene;    HBN;    Microstructure;    Mechanical properties;   

DOI  :  10.1016/j.msea.2019.04.002

来源: Elsevier

【 摘 要 】

The multiphase co-reinforcing composite combines the advantages of different reinforcing phases to give composite superior properties. In this study, nano-carbon and hexagonal boron nitride (HBN) reinforced Cu-Ti3SiC2-C composites are fabricated by surface modification, ball milling, vacuum hot pressing (VHP) and hot isostatic pressing (HIP). The content of nano-carbon is 0.5 wt%, and the ratio of multi walled carbon nanotubes (MWCNTs) to graphene was 4:1, 1:1 and 1:4, respectively. Microstructure and mechanical properties of the prepared composites are systematically tested and analyzed. Results show that the interface bonding mode between the reinforcements and matrix is mainly mechanical locking. The composite with the ratio of MWCNTs to graphene is 4:1 shows the best properties in which the hardness, tensile, compressive and shear strength are 121.91 HV, 163.87 MPa, 431.86 MPa and 122.56 MPa, respectively. The reinforcements improve the properties of composites by the mechanisms of load transfer, fine grain strengthening, particle strengthening and anti friction lubrication.

【 授权许可】

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