W-M(M=Cu, Sn, Ni)계 고밀도 복합재료 제조에 관한 기초연구(I)
A Basic Study on the Fabrication of W-M(M=Cu, Sn, Ni) System High Density Composite (I)
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초록
For the purpose of obtaining basic information on the development of lead-free materials, a high density composites (a) W-Cu, (b) W-Sn (c)W-Cu-Sn and (d) W-Cu-Ni were fabricated by the P/M method. The particle size of used metal powders were under 325 mesh, inner size of compaction mould was Ø8 ㎜, and compaction pressure was 400 ㎫. A High density composite samples were sintered at a temperature between 140℃ and 1050℃ for 1 hour under Ar atmosphere. The microstructure, phase transformation and physical properties of the sintered samples were investigated. As the results, the highest relative density of 95.86% (10.87 g/㎤) was obtained particularly in the sintered W-Cu-Sn ternary system sample sintered at 450 for 1hr. And, Rockwell hardness (HRB) of 70.0 was obtained in this system.
Abstract
For the purpose of obtaining basic information on the development of lead-free materials, a high density composites (a) W-Cu, (b) W-Sn (c)W-Cu-Sn and (d) W-Cu-Ni were fabricated by the P/M method. The particle size of used metal powders were under 325 mesh, inner size of compaction mould was Ø8 ㎜, and compaction pressure was 400 ㎫. A High density composite samples were sintered at a temperature between 140℃ and 1050℃ for 1 hour under Ar atmosphere. The microstructure, phase transformation and physical properties of the sintered samples were investigated. As the results, the highest relative density of 95.86% (10.87 g/㎤) was obtained particularly in the sintered W-Cu-Sn ternary system sample sintered at 450 for 1hr. And, Rockwell hardness (HRB) of 70.0 was obtained in this system.
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