Effect of hot extrusion temperature on graphene nanoplatelets reinforced Al6061 composite fabricated by pressure infiltration method

被引：60

作者：

Shao, Puzhen ^{[1
]}

Chen, Guoqin ^{[1
]}

Ju, Boyu ^{[1
]}

Yang, Wenshu ^{[1
]}

Zhang, Qiang ^{[1
]}

Wang, Zhijun ^{[1
]}

Tan, Xin ^{[1
,3
]}

Pei, Yinyin ^{[2
]}

Zhong, Sujuan ^{[2
]}

Hussain, Murid ^{[4
]}

Wu, Gaohui ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, PO 3023,Sci Pk,2 Yikuang St, Harbin 150001, Peoples R China

[2] Zhengzhou Res Inst Mech Engn Co Ltd, State Key Lab Adv Brazing Filler Mat & Technol, Zhengzhou 450001, Peoples R China

[3] CECEP Environm Protect Equipment Co Ltd, Beijing 100082, Peoples R China

[4] COMSATS Univ Islamabad, Dept Chem Engn, Lahore Campus,Def Rd,Off Raiwind Rd, Lahore 54000, Pakistan

来源：

CARBON | 2020年 / 162卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Al matrix composites; Graphene nanoplatelets; Hot extrusion; Deformation treatment; ENHANCED MECHANICAL-PROPERTIES; ALUMINUM-MATRIX COMPOSITES; IN-SITU SYNTHESIS; TENSILE PROPERTIES; POWDER-METALLURGY; STRENGTHENING MECHANISMS; HEAT-TREATMENT; PARTICLE-SIZE; MICROSTRUCTURE; ALLOY;

D O I：

10.1016/j.carbon.2020.02.080

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In the present work, 0.6 wt% graphene nanoplatelets reinforced 6061Al (GNPs/6061Al) composite was prepared by pressure infiltration process and hot extruded (HE) at 420 degrees C-500 degrees C in order to investigate the evolution of GNPs in different extrusion temperature, which has not been reported yet. The GNPs agglomeration were eliminated by extrusion and were arranged in an orientation. In the sample extruded at 420 degrees C, the dispersion effect was not significant and agglomeration of large-sized GNPs was still found. However, the agglomeration of the GNPs was eliminated when extruded at 450 degrees C, and waved structure, exfoliation and bend of GNPs were observed. While in the sample at 500 degrees C, interlayer sliding of GNPs and interfacial reaction product Al4C3, due to excessively high extrusion temperature, were detected. The composites extruded at 450 degrees C showed the highest yield strength and ultimate tensile strength of 389 MPa and 500 MPa, respectively, which increased 16.8% and 40.1% comparing with the unreinforced matrix. The present results indicate that the uniform dispersion of graphene is still one of the main challenges in Graphene/Al composites, while the deformation treatment provides the possibility of further dispersion of graphene. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页码：455 / 464

页数：10