In-situ synthesis of novel Al-Fe-Si metallic glass coating by arc spraying

被引：48

作者：

Cheng, Jiangbo ^{[1
,2
]}

Wang, Baolei ^{[1
]}

Liu, Qi ^{[1
]}

Liang, Xiubing ^{[2
]}

机构：

[1] Hohai Univ, Coll Mech & Mat, 8 Focheng West Rd, Nanjing 211106, Jiangsu, Peoples R China

[2] Acad Armored Forces Engn, Natl Engn Res Ctr Mech Prod Remfg, Beijing 100072, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 716卷

基金：

中国国家自然科学基金;

关键词：

Coatings; Thermal spray processing; Metallic glass; NANOCRYSTALLINE ALLOYS; ALUMINUM; BEHAVIOR; STEEL;

D O I：

10.1016/j.jallcom.2017.05.032

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A novel in situ forming Al-Fe-Si metallic glass coating comprising partial nanoscale particles embedded in Al-based metallic glass matrix was synthesized by arc spraying process. The coating is adhering well and very compact with porosity of less than 2%. The volume fraction of metallic glass is 74.9% approximately. The onset crystallization temperature of the coating is 359 degrees C. The coating exhibits a high hardness (H= 4.25 GPa) and reduced Young's modulus (E = 235 GPa), together with good H/E, H-2/2E and elastic recovery (h value). Dry sliding wear testing of the coating shows that the relative wear resistance of the coating is about 2.9 times that of the Al-6061 alloy under the same testing conditions. The dominating wear mechanism of the coating is a combination of brittle fracture delamination coupled with oxidative wear under dry sliding conditions. Meanwhile, potentiodynamic studies of the metallic glass coating in 0.6 M NaCl solution displays better corrosion resistance than that of Al alloyed coatings and EQ70 marine steel. In addition, the reasons actualizing the enhancement of the mechanical properties and corrosion resistance were elucidated. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：88 / 95

页数：8

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