本文選題：W-Cu復(fù)合粉　切入點(diǎn)：顯微組織　出處：《粉末冶金工業(yè)》2017年04期

【摘要】：通過水熱-共還原法制備細(xì)晶W-25Cu復(fù)合材料,并分析其微觀組織和電弧侵蝕后組織形態(tài)的變化。結(jié)果表明:W-25Cu復(fù)合材料的顯微組織具有明顯的全致密化特點(diǎn),Cu相將細(xì)小W顆粒全部包圍,Cu相與W相的分布狀態(tài)非常均勻,W相的晶粒尺寸為1~3μm,斷口區(qū)域表現(xiàn)出明顯的韌窩斷裂特征,斷裂階段還生成了眾多彎曲的細(xì)密撕裂棱,形成了許多稠密的細(xì)小斷口韌窩。經(jīng)電弧侵蝕后,表面物相構(gòu)成以Cu、W兩相為主,表面形貌較為平整,未出現(xiàn)明顯的孔洞與裂紋結(jié)構(gòu)。在斷裂閉合階段,材料轉(zhuǎn)移過程基本表現(xiàn)為電弧轉(zhuǎn)移、熔橋轉(zhuǎn)移及噴濺蒸發(fā)這幾種類型。
[Abstract]:Fine grained W-25Cu composites were prepared by hydrothermal co-reduction method and the microstructure and morphology of the composites after arc erosion were analyzed.The results show that the microstructure of the WW-25Cu composite has obvious characteristics of full densification. The distribution of the fine W particles around the Cu phase and the W phase is very homogeneous. The grain size of the W phase is 1 ~ 3 渭 m, and the fracture area shows obvious dimple fracture characteristics.During the fracture stage, many curved fine tearing edges were formed, and many dense fine fracture dimples were formed.After arc erosion, the surface phase composition is mainly CuW two-phase, the surface morphology is relatively flat, and there is no obvious pore and crack structure.At the stage of fracture closure, the material transfer process is characterized by arc transfer, fusion bridge transfer and spatter evaporation.
【作者單位】： 河南廣播電視大學(xué)機(jī)電工程學(xué)院;鄭州信息科技職業(yè)學(xué)院機(jī)械工程學(xué)院;
【基金】：2017年河南省科技攻關(guān)項(xiàng)目(172102210237)
【分類號】：TB331;TM564
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本文編號：1723390