Microstructure and anti-oxidation behavior of laser clad Ni-20Cr coating on molybdenum surface

被引：21

作者：

Huang, Can ^{[1
]}

Zhang, Yongzhong ^{[1
]}

Vilar, Rui ^{[2
,3
]}

机构：

[1] Gen Res Inst NonFerrous Met, Natl Engn Res Ctr Nonferrous Met Composites, Beijing 100088, Peoples R China

[2] Inst Super Tecn, Lisbon, Portugal

[3] ICEMS Inst Ciencia & Engn Mat & Superficies, Lisbon, Portugal

来源：

SURFACE & COATINGS TECHNOLOGY | 2010年 / 205卷 / 03期

关键词：

Laser cladding; Ni-20Cr; Molybdenum; Oxidation behavior; Microstructure; HIGH-TEMPERATURE OXIDATION; MO-CR ALLOY; SPRAYED NI-20CR; RESISTANCE; COPPER;

D O I：

10.1016/j.surfcoat.2010.08.021

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A Ni-20Cr coating was deposited on a molybdenum substrate by laser cladding. The observation of the microstructure by SEM demonstrates that the coating is free of cracks and pores, and metallurgically bonded to the substrate. XRD and EDS analysis results show that some dilution occurs at the coating/substrate interface and that Mo combines with Ni-20Cr, to form a Ni-Cr-Mo alloy coating with slight oxidation. The oxidation behavior of the coating indicates that the laser clad Ni-20Cr coating can effectively prevent oxidation of molybdenum at 600 degrees C in air. The oxide scale formed on the coating surface by oxidation in air is composed of NiO, Cr2O3 and NiMoO4. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：835 / 840

页数：6

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