Optical and conductive properties of AlSi-alloy/SiCp composites: application in modelling CO2 laser processing of composites |
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| Authors: | A. Grabowski, M. Nowak,J.
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| Affiliation: | aInstitute of Physics, Silesian University of Technology, ul. Krasińskiego 8, PL40-019 Katowice, Poland;bDepartment of Material Science, Silesian University of Technology, ul. Krasińskiego 8, PL40-019 Katowice, Poland |
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| Abstract: | ![]()
The optical properties—reflectivity, real part of the refractive index, absorption coefficient as well as the thermal and electrical conductivity of AlSi-alloy/SiCp composite were measured. The optical parameters and both conductivities decreased with the increase of SiCp particles volume in AlSi-alloy matrix. This decrease was almost linear for the volume fraction of SiCp particle up to 10 vol% of the total mass of the composite. For the 15 vol% of SiCp particles, the departure from linearity is connected with the presence of additional phases in AlSi-alloy/SiCp composite materials. The measured temperature dependencies of optical reflectivity and electrical conductivity for AlSi-alloy/SiCp 15 vol% are of metallic character. Modelling of the interaction of the CO2 laser radiation with AlSi-alloy/SiCp 15 vol% composite should allow to estimate the initiation time at which the surface composite reaches melting temperature. |
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| Keywords: | Optical properties Reflectivity Refractive index Absorption coefficient Conductivity Alloys Composites |
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