TRẦN BẢO TRUNG*, ĐOÀN ĐÌNH PHƯƠNG, NGUYỄN VĂN TOÀN
Viện Khoa học Vật liệu, Viện Hàn lâm Khoa học và Công nghệ Việt Nam, Số 18, Hoàng Quốc Việt
TRỊNH MINH HOÀN
Học viện Khoa học và Công nghệ, Viện Hàn lâm Khoa học và Công nghệ Việt Nam, Số 18, Hoàng Quốc Việt, Cầu Giấy, Hà Nội
NGÔ DUY CÔNG, ĐẶNG QUỐC KHÁNH
Viện Khoa học và Kỹ thuật Vật liệu, Trường Đại học Bách khoa Hà Nội, Số 1, Đại Cồ Việt, Hai Bà Trưng, Hà Nội
* Email: trungtb@ims.vast.ac.vn
In this work, the porous copper samples were produced via the powder metallurgy using NaCl as the space holder. Cu and NaCl powders were mixed by a double-cone mixing machine and then pressed into the cylindrical pellets (12 mm in diameter) at the pressure of 100 MPa. The sintering was done in a tube furnace using hydrogen environment at 900 oC for 1h. After sintering, the samples were subjected to vibration in water for 3h to remove the NaCl particles. The results showed that the porous copper has been produced and NaCl has been completely removed after the ultrasonic process in distilled water. Using NaCl space holder, the porous structure has two types of pores: the macropore induced by the removement of NaCl and the micro-pore induced by the partial sintering of Cu powders. With increase of NaCl content from 0 to 20 wt.%, the porosity and permeability of the samples increased from 24 to 58 % and from 1.53×10-13 to 12.46×10-13 m2, respectively. However, the compressive strength of the samples has a decrease with the increase of porosity resulted from the increase of NaCl content.
# Porous copper, powder metallurgy, space holder, porosity, permeability
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RESEARCH
