2O3涂層，通過XRD、SEM和EDS等分析方法對所制備涂層的相組成和顯微結(jié)構(gòu)進(jìn)行了表征。闡明了Al和Fe2O3在加熱和反應(yīng)等離子噴涂過程中的反應(yīng)機(jī)理。DTA分析結(jié)果表明，氬氣氛下長時間熱處理產(chǎn)物主要為Fe、Al2O3和FeAl相。然而，在等離子噴涂過程中，低氧分壓環(huán)境導(dǎo)致中間產(chǎn)物FeAl2O4鐵尖晶石相的生成，由于近常壓等離子噴涂過程的冷卻速度極快，該相可以保留在最終涂層結(jié)構(gòu)中。而低壓反應(yīng)等離子噴涂等離子體射流飛行距離長，還原性氣氛和較長的反應(yīng)時間將其進(jìn)一步還原為FeAl相。"/>

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常壓和低壓環(huán)境下反應(yīng)等離子噴涂Al/Fe2O3 復(fù)合材料的合成機(jī)理
作者:
作者單位:

1.中北大學(xué) 能源與動力工程學(xué)院，山西 太原 030051;2.中北大學(xué) 先進(jìn)能源材料與系統(tǒng)研究院，山西 太原 030051;3.都柏林圣三一學(xué)院 都柏林大學(xué) 機(jī)械制造及生物醫(yī)學(xué)學(xué)院;4.天津重型裝備工程研究有限公司，天津 300457

作者簡介:

通訊作者:

中圖分類號:

基金項(xiàng)目:

山西省基礎(chǔ)研究計(jì)劃資助項(xiàng)目(202103021223193)


Synthesis Mechanism of Reactive Plasma Sprayed Al-Fe2O3 Composites Under Atmosphere and Low-Pressure Ambient Conditions
Author:
Affiliation:

1.School of Energy and Power Engineering, North University of China, Taiyuan 030051, China;2.Institute of Advanced Energy Materials and Systems, North University of China, Taiyuan 030051, China;3.Department of Mechanical and Manufacturing Engineering, Trinity College Dublin, The University of Dublin,Dublin D2PN40, Ireland;4.Tianjin Heavy Equipment Industries Research & Development Co., Ltd, Tianjin 300457, China

Fund Project:

Fundamental Research Program of Shanxi Province (202103021223193)

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    摘要:

    反應(yīng)等離子噴涂（RPS）技術(shù)被廣泛用于制備不同使用需求的高性能涂層材料?；诮?jīng)典的鋁熱反應(yīng)原理，采用反應(yīng)等離子噴涂技術(shù)分別在近常壓和低壓環(huán)境下制備了Al-Fe2O3涂層，通過XRD、SEM和EDS等分析方法對所制備涂層的相組成和顯微結(jié)構(gòu)進(jìn)行了表征。闡明了Al和Fe2O3在加熱和反應(yīng)等離子噴涂過程中的反應(yīng)機(jī)理。DTA分析結(jié)果表明，氬氣氛下長時間熱處理產(chǎn)物主要為Fe、Al2O3和FeAl相。然而，在等離子噴涂過程中，低氧分壓環(huán)境導(dǎo)致中間產(chǎn)物FeAl2O4鐵尖晶石相的生成，由于近常壓等離子噴涂過程的冷卻速度極快，該相可以保留在最終涂層結(jié)構(gòu)中。而低壓反應(yīng)等離子噴涂等離子體射流飛行距離長，還原性氣氛和較長的反應(yīng)時間將其進(jìn)一步還原為FeAl相。

    Abstract:

    Reactive plasma spray (RPS) technique is frequently used to prepare high-performance coating materials with different application requirements. Based on the classical thermite reaction, the Al-Fe2O3 coatings were fabricated by RPS under atmosphere and low-pressure ambient. The phase compositions and microstructures of the obtained coatings were characterized by XRD, SEM and EDS. Moreover, the reaction mechanisms of thermite reaction of Al and Fe2O3 in sintering and RPS process were elucidated. The DTA analysis results indicate that the main sintering products are Fe, Al2O3 and FeAl phases under prolongated reaction condition with Ar gas protetion. However, low oxygen partial pressure leads to the formation of FeAl2O4 hercynite phase as an intermediate product during spraying. In atmosphere-reactive plasma spraying (A-RPS), such phase can be retained in the final coating under extremely fast cooling rate. Furthermore, it can also be continuously reduced to FeAl phase in the low pressure Ar-H2 ambience due to the deoxidation effect and long in-flight distance of plasma jet.

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張釗,殷碩,朱琳.常壓和低壓環(huán)境下反應(yīng)等離子噴涂Al/Fe2O3 復(fù)合材料的合成機(jī)理[J].稀有金屬材料與工程,2023,52(2):486~492.[Zhang Zhao, Yin Shuo, Zhu Lin. Synthesis Mechanism of Reactive Plasma Sprayed Al-Fe2O3 Composites Under Atmosphere and Low-Pressure Ambient Conditions[J]. Rare Metal Materials and Engineering,2023,52(2):486~492.]
DOI：10.12442/j. issn.1002-185X. E20220011

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  • 收稿日期:2022-05-23
  • 最后修改日期:2022-09-12
  • 錄用日期:2022-09-19
  • 在線發(fā)布日期: 2023-03-03
  • 出版日期: 2023-02-28