[3] [3] TRAN T Q, CHINNAPPAN A, LEE J K W, et al.3D printing of highly pure copper［J］.Metals, 2019, 9(7):756.

[4] [4] LI Y J, XIAOTAO LUO X T, RASHID H, et al.A new approach to prepare fully dense Cu with high conductivities and anti-corrosion performance by cold spray［J］.Journal of Alloys and Compounds, 2018,740：406-413.

[5] [5] KADEN L,MATTH.US G,RAMM R,et al.Additive manufacturing of pure copper using ultrashort laser pulses［C］//SPIE LASE.Proc SPIE 10909,Laser 3D Manufacturing VI,San Francisco,California,USA.2019,1090:109090D.

[6] [6] SANTOS E C, SHIOMI M, OSAKADA K, et al.Rapid manufacturing of metal components by laser forming［J］.International Journal of Machine Tools and Manufacture, 2006, 46(12-13): 1459-1468.