Intentional Oxidation and Laser Remelting of Highly Reflective Pure Cu for Its High-Quality Additive Manufacturing

Gu, Rui Nan1,2; Chen, Peng2; Zhou, Ying Hao1; Wang, Hui3; Yan, Xing Chen4; Wong, Kam Sing2; Yan, Ming1

2021-11-01

10.1002/adem.202101138

ADVANCED ENGINEERING MATERIALS   影响因子和分区

1438-1656

1527-2648

Laser processing of pure Cu is often challenging because of Cu's very low absorptivity to most laser beams, and this difficulty is applicable to the recently developed laser powder bed fusion (LPBF) additive manufacturing (AM). How to realize high-quality LPBF forming is urgently pursued to maximize its advanced manufacturing potential in directly making various Cu parts. Herein, two approaches have been applied, individually or simultaneously, to address the poor printability problem of the pure Cu: one is to conduct intentional oxidation treatment to the pure Cu powder to vary its surface structure and then enhance its laser absorptivity; and the other is to adopt laser remelting to counter its high thermal conductivity and provide extra liquid phase for better densification. Various research means were used to investigate mechanical performances, microstructural details, and electrical performance of the as-printed Cu. Results show that a maximum relative density of approximate to 99.0% can be realized by using the two approaches simultaneously, while oxidation temperature and remelting times are the two important factors to be considered. The methodology developed in this study is expected to be applicable to other highly reflective materials as well.

additive manufacturing Cu highly reflective materials oxidation remelting selective laser melting

SCI ; EI

英语

第一 ; 通讯

Natural Science Foundation of Guangdong Province[2020A1515011373] ; Shenzhen Science and Technology Innovation Commission["JCYJ20180504165824643","JSGG20210420091802007"]

Materials Science

Materials Science, Multidisciplinary

WOS:000719982900001

WILEY-V C H VERLAG GMBH

20214711190711

Additives ; Laser beams ; Laser heating ; Remelting ; Selective laser melting ; Surface structure ; Thermal conductivity

Foundries:534.1 ; Thermodynamics:641.1 ; Laser Beam Interactions:744.8 ; Laser Applications:744.9 ; Reproduction, Copying:745.2 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Physical Properties of Gases, Liquids and Solids:931.2

MATERIALS SCIENCE

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
2.Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong 999077, Peoples R China
3.HCStudio Technol LLC, Shenzhen 518057, Peoples R China
4.Guangdong Inst New Mat, Key Lab Guangdong Modern Surface Engn Technol, Guangzhou 510651, Peoples R China

Gu, Rui Nan,Chen, Peng,Zhou, Ying Hao,et al. Intentional Oxidation and Laser Remelting of Highly Reflective Pure Cu for Its High-Quality Additive Manufacturing[J]. ADVANCED ENGINEERING MATERIALS,2021,25(5).

Gu, Rui Nan.,Chen, Peng.,Zhou, Ying Hao.,Wang, Hui.,Yan, Xing Chen.,...&Yan, Ming.(2021).Intentional Oxidation and Laser Remelting of Highly Reflective Pure Cu for Its High-Quality Additive Manufacturing.ADVANCED ENGINEERING MATERIALS,25(5).

Gu, Rui Nan,et al."Intentional Oxidation and Laser Remelting of Highly Reflective Pure Cu for Its High-Quality Additive Manufacturing".ADVANCED ENGINEERING MATERIALS 25.5(2021).