采用粉末冶金技術分別制備球形石墨（SG）和鱗片石墨（FG）增強的銀-石墨復合材料。并用銷-盤式摩擦磨損儀在大氣環(huán)境和3.0N的載荷下研究石墨形貌對銀-石墨復合材料（Ag-SG和Ag-FG）摩擦學行為的影響。結果顯示,Ag-FG的最低磨損率為3.5×10^-5mm³/（N·m）,而Ag-SG的最低磨損率比Ag-FG低一個數(shù)量級,為1.6×10^-6mm³/（N·m）。Ag-SG和Ag-FG顯著不同的摩擦學行為與亞表面裂紋的形成有關。在摩擦過程中,片狀石墨的邊緣容易發(fā)生應力集中,導致Ag-FG亞表面產(chǎn)生裂紋和嚴重的剝層磨損。然而,在Ag-SG中,球形石墨能有效抑制裂紋的萌生和擴展,從而使銀-石墨復合材料具有優(yōu)異的耐磨性能。 

【文章來源】：Transactions of Nonferrous Metals Society of China. 2020,30(08)

【文章頁數(shù)】：11 頁

【文章目錄】：
1 Introduction
2 Experimental
    2.1 Preparation of Ag-graphite composite
    2.2 Tribological tests and characterization
3 Results and discussion
    3.1 Characterization of Ag-FG and Ag-SG composites
    3.2 Friction and wear properties
    3.3 Microstructure of worn surface and wear debris
    3.4 Microstructure evolution of sub-surface
    3.5 Effect of graphite morphology on wear behavior of Ag-graphite composites
4 Conclusions



本文編號：2984084