2Ni21B6晶體相和(Ni,Fe)23B6固溶體組成。而經(jīng)過火焰噴涂制備的涂層,形成了非晶相和納米晶相。通過公式計(jì)算此合金體系粉末和涂層形成非晶相的臨界冷卻速率分別為6.01×105K/s和4.56×103K/s,解釋了在粉末制備過程中較難形成非晶相而噴涂過程中形成非晶結(jié)構(gòu)比較容易。對(duì)涂層的摩擦磨損性能進(jìn)行了測(cè)試,涂層摩擦系數(shù)僅為0.17,具有優(yōu)異的耐磨性能。"/>

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一種新型經(jīng)濟(jì)高效非晶涂層的制備與性能表征
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陸軍裝甲兵學(xué)院 機(jī)械產(chǎn)品再制造國家工程研究中心,陸軍裝甲兵學(xué)院 機(jī)械產(chǎn)品再制造國家工程研究中心,陸軍裝甲兵學(xué)院 機(jī)械產(chǎn)品再制造國家工程研究中心,陸軍裝甲兵學(xué)院 機(jī)械產(chǎn)品再制造國家工程研究中心,中國人民解放軍63963部隊(duì)

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國家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）


Preparation and Properties of A New Cost-effective Amorphous Composite Coating
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National Engineering Research Center for Mechanical Product Remanufacturing,Academy of Armored Forces Engineering,National Engineering Research Center for Mechanical Product Remanufacturing,Academy of Armored Forces Engineering,National Engineering Research Center for Mechanical Product Remanufacturing,Academy of Armored Forces Engineering,National Engineering Research Center for Mechanical Product Remanufacturing,Academy of Armored Forces Engineering,PLA 63963 troops

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    利用火焰噴涂技術(shù)噴涂自制的氣霧化合金粉末取代非晶粉末,制備了NiFeBSiNb非晶納米晶涂層。分別對(duì)粉末和涂層的微觀組織結(jié)構(gòu)和熱力學(xué)性能進(jìn)行了表征。結(jié)果表明,自制的合金粉末球形度較好,大多為球形或橢球形；主要為晶體結(jié)構(gòu),由Nb2Ni21B6晶體相和(Ni,Fe)23B6固溶體組成。而經(jīng)過火焰噴涂制備的涂層,形成了非晶相和納米晶相。通過公式計(jì)算此合金體系粉末和涂層形成非晶相的臨界冷卻速率分別為6.01×105K/s和4.56×103K/s,解釋了在粉末制備過程中較難形成非晶相而噴涂過程中形成非晶結(jié)構(gòu)比較容易。對(duì)涂層的摩擦磨損性能進(jìn)行了測(cè)試,涂層摩擦系數(shù)僅為0.17,具有優(yōu)異的耐磨性能。

    Abstract:

    A NiFeBSiNb amorphous/nanocrystalline composite coating was prepared through flame thermal spraying, where a gas atomized alloy powder substituted an amorphous powder. The microstructure and thermal behavior of the laboratory-produced powders and the produced as-sprayed coating were characterized. The results demonstrated that the powder, which was spherical or ellipsoidal, was mainly consisted of the Nb2Ni21B6 and (Ni,Fe)23B6 crystalline phases, whereas the as-sprayed coating was consisted of a glassy structure and certain nanocrystalline phases. It was observed through calculations that the Rc (critical cooling rate) of the powder and the as-sprayed coating for the amorphous phases formations were 6.01×105 K/s and 4.56×103 K/s, respectively. A probable explanation for the amorphous structure, as it occurred in the as-sprayed coating, was rapid quenching from the melt at the cooling rates which exceeded the critical cooling rate Rc. The prepared coating of these as-sprayed amorphous coatings displayed the properties of a 0.17 low friction coefficient and excellent wear resistance.

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商俊超,梁秀兵,陳永雄,徐濱士,曹維.一種新型經(jīng)濟(jì)高效非晶涂層的制備與性能表征[J].稀有金屬材料與工程,2018,47(10):2986~2992.[Shang Junchao, Liang Xiubing, Chen Yongxiong, Xu Binshi, Cao Wei. Preparation and Properties of A New Cost-effective Amorphous Composite Coating[J]. Rare Metal Materials and Engineering,2018,47(10):2986~2992.]
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  • 收稿日期:2017-11-10
  • 最后修改日期:2018-08-26
  • 錄用日期:2018-01-10
  • 在線發(fā)布日期: 2018-11-08
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