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CuCo2Be表面熱噴涂制備Cr3C2-NiCr涂層的微觀結(jié)構(gòu)及高溫摩擦磨損行為
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江蘇高校省級(jí)重點(diǎn)實(shí)驗(yàn)室開(kāi)放課題（Kjsmcx2012001）；蘭州理工大學(xué)甘肅省有色金屬新材料省部共建國(guó)家重點(diǎn)實(shí)驗(yàn)室開(kāi)放課題


Microstructure and the High Temperature Friction and Wear Behavior of Cr3C2-NiCr Coating on CuCo2Be Alloy by Plasma Spraying
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    摘要:

    選用等離子噴涂技術(shù)在CuCo2Be合金表面制備了Cr3C2-NiCr/NiAl復(fù)合涂層。以Al2O3陶瓷球?yàn)閷?duì)偶材料運(yùn)用UMT-2摩擦磨損試驗(yàn)機(jī)對(duì)基體和復(fù)合涂層進(jìn)行高溫摩擦磨損試驗(yàn)，并選用共聚焦激光掃描顯微鏡、掃描電鏡、能譜儀、XRD等分析測(cè)試手段，詳細(xì)研究了CuCo2Be合金表面等離子噴涂涂層物相組成、微觀形貌及涂層和基體的高溫滑動(dòng)摩擦磨損行為，結(jié)果表明：CuCo2Be合金表面等離子噴涂獲得的復(fù)合涂層致密，涂層為層狀結(jié)構(gòu)，物相組成呈現(xiàn)非晶態(tài)。通過(guò)高溫摩擦磨損研究，結(jié)果表明：500 ℃摩擦磨損磨損過(guò)程中，涂層及CuCo2Be合金基體的磨損機(jī)制為：疲勞磨損和粘著磨損及少量氧化磨損的共同作用，從磨損的體積形貌來(lái)看涂層磨損量明顯小于未噴涂之前的基體材料，等離子噴涂工藝制備的Cr3C2-NiCr/NiAl涂層質(zhì)量?jī)?yōu)異，提高了材料的高溫耐磨性。

    Abstract:

    Cr3C2-NiCr/NiAl coating on the CuCo2Be alloy was prepared by a plasma spraying technique. The high temperature dry sliding friction and wear characteristics of Cr3C2-NiCr/NiAl coating and CuCo2Be were investigated at UMT-2 tribometer using Al2O3 ceramic ball as dual material. The formation mechanism, the microstructure and the high temperature friction and wear behavior of the Cr3C2-NiCr/NiAl coating were studied by Olympus confocal laser scanning microscope, SEM, EDS, and XRD. The results show that the coating is layered and compact. Nickel-aluminum compounds are angular. The phase composition of the coating is amorphous. During the friction and wear process at 500 oC, the wear mechanisms of the coating and CuCo2Be alloy are abrasive wear and adhesive wear as well as a small amount of oxidation wear. Through observing the wear volume morphology, it would find that the wear of substrate materials with the coating is significantly less than CuCo2Be before spraying, so the high-temperature wear resistance of CuCo2Be alloy is improved by plasma spraying.

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李 惠,程曉農(nóng),謝春生,陸鵬程. CuCo2Be表面熱噴涂制備Cr3C2-NiCr涂層的微觀結(jié)構(gòu)及高溫摩擦磨損行為[J].稀有金屬材料與工程,2014,43(8):2011~2016.[Li Hui, Cheng Xiaonong, Xie Chunsheng, Lu Pengcheng. Microstructure and the High Temperature Friction and Wear Behavior of Cr3C2-NiCr Coating on CuCo2Be Alloy by Plasma Spraying[J]. Rare Metal Materials and Engineering,2014,43(8):2011~2016.]
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  • 收稿日期:2013-09-04
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  • 在線發(fā)布日期: 2015-01-04
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