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오늘 본 자료
Fundamental Aspects of Resistance Sintering under Ultrahigh Pressure Consolidation
Zhou, Zhangjian,Kim, Ji-Soon,Yum, Young-Jin The Korean Powder Metallurgy Institute 2012 한국분말재료학회지 (KPMI) Vol.19 No.1
The consolidation results of fine tungsten powders, W-Cu composite and W/Cu FGM by using a novel method combining resistance sintering with ultra high pressure have been reviewed. The densification effects of the consolidation parameters, including pressure, input power and sintering time, have been investigated. The sintering mechanism of this method was quite different from other sintering methods. Particle rearrangement, sliding, distortion and crushing due to the ultra high pressure are the dominant mehanisms at the initial stage, then the dominant sintering mechanisms are transient arc-fused processes controlled by the input power.
염영진(Young-Jin Yum),김형수(Hyeong-Soo Kim),이철경(Cheol-Kyung Lee),Zhangjian Zhou 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
W/Cu FGM(Functionally Graded Materials) were fabricated by a novel method; resistance sintering under ultra-high pressure. To be used for plasma-facing material in fusion reactor, small scale W/Cu FGM mockup is manufactured and tested for structural optimization. Stress and strain distributions were obtained by finite element analysis for the various types of FGM mockups under heat load. Stress and plastic strain in W/Cu with graded interlayer were smaller than those in W/Cu with a sharp interface and the effect of grading the interlayer was found to be significant.