Effect of the addition of Sm2O3 on the microstructure of laser cladding alloy coating layers

被引：6

作者：

Zhang, Shi Hong ^{[1
,2
]}

Li, Ming Xi ^{[1
]}

Cho, Tong Yul ^{[2
]}

Yon, Jae Hong ^{[2
]}

Fang, Wei ^{[2
]}

Joo, Yun Kon ^{[2
]}

Kang, Jin Ho ^{[2
]}

Lee, Chan Gyu ^{[2
]}

机构：

[1] Anhui Univ Technol, Sch Mat Sci & Engn, Maanshan City 243002, Anhui, Peoples R China

[2] Changwon Natl Univ, Sch Nano & Adv Mat Engn, Changwon Si 641773, Gyeongnam, South Korea

来源：

METALS AND MATERIALS INTERNATIONAL | 2008年 / 14卷 / 03期

关键词：

laser cladding; Ni-based alloy; micron-sized and nano-sized Sm2O3; microstructure; rapid solidification;

D O I：

10.3365/met.mat.2008.06.315

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects on the microstructures and phases of coating layers by the addition of micron-sized (in) and nano-sized (n) (m&n) Sm2O3 powders were investigated. The coating materials, which were prepared by means of 2.0 kW CO2 laser cladding, consist of a powder mixture of in Ni-based alloy (NBA) powders comprising 1.5 Wt.% In Sm2O3 and 3.0 % n Sm2O3 powders. The results indicate that gamma-Ni, Cr23C6 and Ni3B are the primary phases of the NBA coatings. The Fe7SM and Ni3Si phases are highlighted by the addition of m&n Sm2O3 powders. From the substrate, planar crystal layers are first grown in all NBA and m&n Sm2O3/NBA coatings. The dendrite growth then occurs as a result of the addition of the m Sm2O3 powder, and the equiaxed dendrite growth occurs as a result of the addition of the n Sm2O3. With the addition of a rare earth oxide such as Sm2O3 powder, the width of the planar crystal becomes smaller than that of the NBA coating.

引用

页码：315 / 319

页数：5

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