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石墨烯增強(qiáng)鈦基復(fù)合材料制備工藝與性能研究
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陜西省重點研發(fā)計劃一般項目(2018GY-11)


Investigation of Graphene Reinforced Titanium Matrix Composites Preparation Process and Properties
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    摘要:

    以多層石墨烯為增強(qiáng)體,通過熔煉鍛造(MF)和粉末冶金(PM) 2種工藝分別制備出規(guī)格為Φ10 mm的石墨烯增強(qiáng)鈦基復(fù)合材料棒材。石墨烯在凝固過程中以TiC枝晶形態(tài)析出,變形后呈細(xì)小顆粒,其中Ti和C原子比約為2∶1。石墨烯和球形鈦粉經(jīng)過機(jī)械合金化和變形加工,在基體中反應(yīng)形成薄片層。MF工藝對應(yīng)的棒材拉伸強(qiáng)度可達(dá)476 MPa,延伸率保持在28%; PM工藝對應(yīng)的棒材拉伸強(qiáng)度可達(dá)487 MPa,延伸率保持在30%。PM工藝可形成尺寸較小的薄片狀石墨烯增強(qiáng)體,強(qiáng)化作用提升,同時塑性沒有顯著下降。

    Abstract:

    Two kinds of Φ10 mm graphene reinforced titanium matrix composites bars were prepared by melting and forging( MF) and powder metallurgy( PM) process using the multilayer graphene as the reinforcer. The dendritic TiC phase precipitated during solidification,and the phase was refined into small particles after extrusion and rolling processes. The ratio of Ti and C atoms approximated to 2∶ 1. The graphene reacted with titanium matrix forming TiC thin layers during the mechanical alloying and deformation processes. And both of the tensile properties corresponding to the MF and PM processes were tested. The results show that the ultra tensile strength( UTS) of MF process reaches to 476 MPa with 28% elongation,and the UTS of PM process reaches to 487 MPa with 30% elongation. It is indicated that the strengthening effect of the small graphene reinforced layer is more obvious,and the plasticity almost keeps in the same level as the Ti C particles.

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.石墨烯增強(qiáng)鈦基復(fù)合材料制備工藝與性能研究[J].鈦工業(yè)進(jìn)展,2019,36(1):8-12.

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  • 在線發(fā)布日期: 2019-06-03
  • 出版日期: 2019-02-25