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Materials Science and Engineering of Powder Metallurgy  2020, Vol. 25 Issue (6): 480-485    DOI:
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Microstructure and nano-indentation behavior of detonation sprayed iron-based amorphous coating
OUYANG Sheng1, CHU Zhiqiang1, TANG Qiuhao2, XIE Lu3
1. Hunan Metallurgy Material Institute Co., Ltd., Changsha 410014, China;
2. Hunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and Conversion,Hunan University of Science and Technology, Xiangtan 411201, China;
3. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
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Abstract  The iron-based amorphous coatings were prepared by detonation spray under three kinds of oxygen fuel ratios. The microstructure and nanoindentation behavior were examined by XRD, SEM and nanoindenter. The results show that the amorphous phase contents of coatings under 1:1, 1.2:1 and 1.5:1 are calculated to be 88.71%, 86.18% and 81.36%, respectively. The variation speeds of indentation depth are similar under different load, indicating the homogenous coating structure. In similar position, the coatings under oxygen fuel ratios of 1:1 and 1.2:1 have higher hardness, exhibiting smaller maximum indentation depth. In the longitudinal direction, the variation of nanohardness is very small. In the transverse direction, the nanohardness value decreases from 16.75 GPa to 10.25 GPa with increasing the distance from the coating to the substrate.
Key wordsdetonation spray      iron-based amorphous coating      oxygen fuel ratio      microstructure      indentation behavior     
Received: 23 July 2020      Published: 18 January 2021
ZTFLH:  TG139+.8  
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OUYANG Sheng
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XIE Lu
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OUYANG Sheng,CHU Zhiqiang,TANG Qiuhao, et al. Microstructure and nano-indentation behavior of detonation sprayed iron-based amorphous coating[J]. Materials Science and Engineering of Powder Metallurgy, 2020, 25(6): 480-485.
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