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Fabrication of a lightweight Al alloy mirror through 3D printing and replication methods.

Wang, Yongjie; Wu, Xiaoge; Xu, Liang; Ding, Jiaoteng; Ma, Zhen; Xie, Yongjie.
Appl Opt; 57(27): 8096-8101, 2018 Sep 20.
Artigo em Inglês | MEDLINE | ID: mdl-30462083
In order to realize rapid fabrication of a lightweight mirror, an AlSi10Mg alloy mirror was made through 3D printing and replication methods. The mechanical, thermal, and physical properties, the surface accuracy, and the dimensional stability were investigated. Through a selective laser melting method, an Al alloy mirror was printed and exhibited a low areal density of 28.4 kg/m2. Through replication, the mirror surface accuracy was improved to 0.033λ (root mean square, λ=632.8 nm); surface roughness was 1.3 nm (Ra). The stability test result indicated that the 3D printed mirror presented good dimensional stability in air for a long time and in a temperature changing environment.
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