Influence of Spark Plasma Sintering Conditions on the Optical and Mechanical Properties of Spinel
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Published:2020-11-01
Issue:11
Volume:20
Page:6821-6826
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ISSN:1533-4880
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Container-title:Journal of Nanoscience and Nanotechnology
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language:en
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Short-container-title:j nanosci nanotechnol
Author:
Ko Seok-Young1,
Lee Kisu1,
Choi Doo Hyun1,
Yong Seok-Min1,
Cheong Dong-Ik1
Affiliation:
1. Agency for Defense Development (ADD), Yuseong P.O. Box 35, Daejeon 34816, Republic of Korea
Abstract
The influence of spark plasma sintering (SPS) conditions on the optical and mechanical properties of MgAl2O4 spinel was investigated for application to infrared windows as parts of military systems. The thermal conditions of SPS, including the temperature and heating
rate, have a significant impact on optical and mechanical properties. This study shows that the formation and growth of abnormal grains cause mechanical degradation with an increasing SPS temperature. In-line transmittance (Tin) was affected by the heating rate due to changes
in oxygen vacancy and carbon contamination in SPSed samples. The fabricated spinel exhibited excellent flexural strength of 401 MPa and an average mid-infrared transmittance of 84.8% in the range of 3–5 μm.
Publisher
American Scientific Publishers
Subject
Condensed Matter Physics,General Materials Science,Biomedical Engineering,General Chemistry,Bioengineering