Tungsten-Copper Composite Fabricated by Hot-shock Consolidation
High-temperature shock consolidation and under-water shock wave are two effective methods to eliminate cracks generated when shock wave propagating the powder bed.In this work,a novel assembly consists of a chemical furnace and a water column was used to fabricate tungsten-copper composites.The heat released from the reaction of a SHS reaction mixture was used as chemical furnace to preheat the precursor powder.The water column as well as the explosive attached was detached from the furnace by a solenoid valve fixed on the slide guide.So the explosive and water column was kept cooling during the preheating process.The W-Cu powders with the grain size of 2μm were first blended with mass ratio of 9:1 by mechanically alloying in a planetary ball mill.Prior to application of shock wave,the elemental powders were preheated at different temperatures,i.e.the highest temperature up to 1000℃.The intensity of the shock wave loading was under 10GPa.The consolidated specimens were then characterized by microstructure analysis and micro-hardness testing.The different micromechanical behaviors of W and Cu phase in the consolidated sample were studied by using in situ high-energy X-ray diffraction technique.The result showed that a fine-grained 90W/10Cu composite with no cracks could be compacted to a density of 16.44g/cm3 by hot-shock consolidation at a preheating temperature of 970℃.
W-Cu composite High temperature shock consolidation Chemical furnace
Qiang Zhou Pengwan Chen Danzhu Ma
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
372-377
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）