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Author:

Yao, Haihua (Yao, Haihua.) | Zhou, Zheng (Zhou, Zheng.) (Scholars:周正) | Wang, Liang (Wang, Liang.) | Tan, Zhen (Tan, Zhen.) | He, Dingyong (He, Dingyong.) (Scholars:贺定勇) | Zhao, Lidong (Zhao, Lidong.)

Indexed by:

Scopus SCIE

Abstract:

To protect aluminum parts in vehicle engines, metal-based thermal barrier coatings in the form of Fe59Cr12Nb5B20Si4 amorphous coatings were prepared by high velocity oxygen fuel (HVOF) spraying under two different conditions. The microstructure, thermal transport behavior, and wear behavior of the coatings were characterized simultaneously. As a result, this alloy shows high process robustness during spraying. Both Fe-based coatings present dense, layered structure with porosities below 0.9%. Due to higher amorphous phase content, the coating H-1 exhibits a relatively low thermal conductivity, reaching 2.66 W/(m.K), two times lower than the reference stainless steel coating (5.85 W/(m.K)), indicating a good thermal barrier property. Meanwhile, the thermal diffusivity of amorphous coatings display a limited increase with temperature up to 500 degrees C, which guarantees a steady and wide usage on aluminum alloy. Furthermore, the amorphous coating shows better wear resistance compared to high carbon martensitic GCr15 steel at different temperatures. The increased temperature accelerating the tribological reaction, leads to the friction coefficient and wear rate of coating increasing at 200 degrees C and decreasing at 400 degrees C.

Keyword:

wear behavior microstructure thermal conductivity amorphous coating

Author Community:

  • [ 1 ] [Yao, Haihua]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Zhou, Zheng]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Wang, Liang]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Tan, Zhen]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 5 ] [He, Dingyong]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 6 ] [Zhao, Lidong]Rhein Westfal TH Aachen, Surface Engn Inst, D-52062 Aachen, Germany

Reprint Author's Address:

  • 周正

    [Zhou, Zheng]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China

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Source :

COATINGS

ISSN: 2079-6412

Year: 2017

Issue: 10

Volume: 7

3 . 4 0 0

JCR@2022

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count: 27

SCOPUS Cited Count: 27

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 11

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