Metal-ceramic composite layer formation on Al-Si alloy by laser processing

被引：0
|
作者：
Jaffar, MJM
Sastikumar, D [1 ]
Nath, AK
机构：
[1] Jamal Mohamed Coll, Dept Phys, Tiruchirappalli 620020, India
[2] Natl Inst Technol, Dept Phys, Tiruchirappalli 620015, India
[3] Ctr Adv Technol, Ind CO2 Laser Sect, Indore 452013, India
来源：
LASERS IN ENGINEERING | 2005年 / 15卷 / 3-4期
关键词：
Al-Si alloy; Ni-SiC composite; laser surface modification; needle and dendrite structures; epitaxial growth and Al2O3;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An Al-Si alloy was laser surface treated with Ni-SiC powders to produce a composite layer to improve its surface properties. The composite layer was formed when the coating composition of Ni-SiC was 25-75 (%wt.) and the laser processing parameters set at 2.5kW (laser power) and 0.5 m/min.(scan speed). The thickness of the composite layer was about 120 microns. The layer exhibited an average microhardness of 425 HV, which is nearly 5 times that of the Al-Si alloy substrate. The paper discusses the microhardness, microstructural and microchemical studies made on the laser treated samples.
引用
收藏
页码：267 / 283
页数：17
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