Effects of Surface Modification of SiCpon the Wear-resistance of Aluminium-silicon-based Composites

Yang Jianlin; Long Lvwei; Li Yongjing; Zhu Jiaying; Zhang Yingying

doi:10.15980/j.tzzz.2016.03.017

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Effects of Surface Modification of SiCpon the Wear-resistance of Aluminium-silicon-based Composites
Vol. 36, Issue 3, Pages: 287-290(2016)
Published： 2016 ，
DOI： 10.15980/j.tzzz.2016.03.017

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[1]杨建林,龙律位,李永靖,朱佳莹,张莹莹.SiC_p表面改性对Al-Si基复合材料耐磨性的影响[J].特种铸造及有色合金,2016,36(03):287-290.

Yang Jianlin, Long Lvwei, Li Yongjing, et al. Effects of Surface Modification of SiCpon the Wear-resistance of Aluminium-silicon-based Composites. [J]. Special Casting & Nonferrous Alloys 36(3):287-290(2016)
[1]杨建林,龙律位,李永靖,朱佳莹,张莹莹.SiC_p表面改性对Al-Si基复合材料耐磨性的影响[J].特种铸造及有色合金,2016,36(03):287-290. DOI： 10.15980/j.tzzz.2016.03.017.

Yang Jianlin, Long Lvwei, Li Yongjing, et al. Effects of Surface Modification of SiCpon the Wear-resistance of Aluminium-silicon-based Composites. [J]. Special Casting & Nonferrous Alloys 36(3):287-290(2016) DOI： 10.15980/j.tzzz.2016.03.017.

摘要

为了改善SiC颗粒（SiC

）与Al-Si基体界面的润湿性

对SiC

进行了高温氧化、NaOH溶液腐蚀、K2ZrF6溶液涂覆表面改性处理

通过粉末冶金法制备了不同表面改性状态的SiC

增强Al-Si基复合材料。研究表明

随氧化时间的增加

SiC

表面SiO2层的厚度增加。经过NaOH溶液腐蚀后SiC

表面变粗糙

K2ZrF6饱和溶液处理后SiC

表面存在一层涂层;随SiC

氧化时间延长

试样的密度、硬度及耐磨性先增加后减小;SiC

氧化10h时

试样磨损量最低

与未改性的SiC

相比

磨损量降低了40%。

Abstract

SiC

was modified by high temperature oxidation

NaOH solution corrosion and K2ZrF6 solution coating to understand effects of modification of SiC

on the wear-resistance of aluminium-siliconbased composites

and the wear-resistance of aluminium-silicon-based composite reinforced by modified SiC

was investigated.The phase

surface morphology

hardness and wear resistance of the composites were tested by X-ray diffractometer（XRD）

scanning electron microscope（SEM）

Brinell hardness tester and ML-10 type wear testing machine

respectively.The results show that the thickness of SiO2 at the surface of SiC

is increased with increasing in oxidation time

and the surface of SiC

become coarse after corrosion by NaOH solution

meanwhile

a coating exists on the surface of SiC

after treated by K2ZrF6 solution.In addition

the density

hardness and wear resistance of the samples are increased firstly and then decreased with oxidation time increase.Compared with sample reinforced by unoxidized SiC

the wear rate is decreased by 40%for sample reinforced by SiC

oxidized at 1 100 ℃for 10 h.