In Situ Mo(Si,Al)2-Based Composite through Selective Laser Melting of a MoSi2-30 wt.% AlSi10Mg Mixture

Tatevik Minasyan; Sofiya Aydinyan; Ehsan Toyserkani; Irina Hussainova

doi:10.3390/ma13173720

In Situ Mo(Si,Al)₂-Based Composite through Selective Laser Melting of a MoSi₂-30 wt.% AlSi10Mg Mixture

Materials (Basel). 2020 Aug 23;13(17):3720. doi: 10.3390/ma13173720.

Authors

Tatevik Minasyan^{1

2}, Sofiya Aydinyan¹, Ehsan Toyserkani², Irina Hussainova¹

Affiliations

¹ Department of Mechanical and Industrial Engineering, Tallinn University of Technology, Ehitajate 5, 19086 Tallinn, Estonia.
² Multi-Scale Additive Manufacturing Laboratory, Department of Mechanical and Mechatronics Engineering, University of Waterloo, 200 University Ave., West Waterloo, ON N2L 3G1, Canada.

Abstract

The laser power bed fusion approach has been successfully employed to manufacture Mo(Si,Al)₂-based composites through the selective laser melting of a MoSi₂-30 wt.% AlSi10Mg mixture for high-temperature structural applications. Composites were manufactured by leveraging the in situ reaction of the components during printing at 150-300 W laser power, 500-1000 mm·s^-1 laser scanning speed, and 100-134 J·mm^-3 volumetric energy density. Microcomputed tomography scans indicated a negligible induced porosity throughout the specimens. The fully dense Mo(Si_1-x,Al_x)₂-based composites, with hardness exceeding 545 HV1 and low roughness for both the top (horizontal) and side (vertical) surfaces, demonstrated that laser-based additive manufacturing can be exploited to create unique structures containing hexagonal Mo(Si_0.67Al_0.33)₂.

Keywords: aluminum alloy; composite; computed tomography; molybdenum disilicide; selective laser melting; surface roughness.

Abstract

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