간행물
한국분말야금학회지 KCI 등재 Journal of Korean Powder Metallurgy Institute
- 발행기관 한국분말재료학회(구 한국분말야금학회)
- 자료유형 학술지
- 간기 격월간
- ISSN 1225-7591 (Print)2287-8173 (Online)
- 수록기간 1994 ~ 2024
- 주제분류 공학 > 금속공학 공학 분류의 다른 간행물
- 십진분류KDC 559DDC 629
권호리스트/논문검색
Vol. 3 No. 1 (1996년 3월) 8건
1.
1996.03
구독 인증기관 무료, 개인회원 유료
4,300원
2.
1996.03
구독 인증기관 무료, 개인회원 유료
Two grades of Permalloy strips, Fe-45Ni(PB) and Fe-78Ni-4Mo-5Cu(PC) were fabricated by powder rolling process from elemental powder mixtures. The roll compacted green strips were sintered, homogenized, cold rolled with or without an intermediate annealing and finally heat treated to measure magnetic properties. For a given thickness reduction, rolling with an intermediate annealing was found more effective to achieve a full densification with no visible micropores and also to obtain better magnetic properties. Increasing the final rolling reduction also produced a marked improvement of the magnetic properties whereas the cooling rate during the final heat treatment has little effect in both grades. Addition of a small amount, 0.4% Mn slightly degraded the properties. As an overall, The PM strips produced via powder rolling yielded the similar soft magnetic properties to the corresponding commercial grades produced via wrought processing.
4,300원
3.
1996.03
구독 인증기관 무료, 개인회원 유료
Flying and solidification behaviors of the particles manufactured by centrifugal atomization were investigated. Both models were solved by the explicit FDM. Flying calculation supported the experimental results that the finer particles flied shorter than coarser particles and that particles flied shorter for lower rotation velocity than for higher velocity. Cooling curve and dendrite arm spacing were predicted by use of heat transfer analysis.
4,000원
4.
1996.03
구독 인증기관 무료, 개인회원 유료
Nanostructured Cu-Pb powders were synthesized by mechanical alloying process. The variation of powder characteristics with mechanical alloying time was investigated by x-ray diffraction, differential scanning calorimetry, SEM and TEM. An electrical resistivity of the hot pressed specimens was also measured by using the nanovoltmeter. It was shown that mechanical alloying for 12 hours leads to a homogenization and a grain refinement to the nanometer scale under 20 nm. The mechanically alloyed Cu-Pb alloys represented the enhanced solid solubility of 10wt% Pb in the Cu matrix. The monotectic temperature of nanostructured Cu-Pb alloy decreased from equilibrium state of 955 to 855 due to reduced grain size effect. The analysis of electrical resistivity showed that the hot pressed MA Cu-5wt% Pb compact existed as a solid solution.
4,000원
5.
1996.03
구독 인증기관 무료, 개인회원 유료
To investigate the phase transformation behaviors of mechanically alloyed Nb-25 at%Al powders, the mixed Nb-25 at%Al powders were mechanically alloyed in SPEX 8000 Mixer/Mill. Mechanical alloying(MA) time was varied between 0.5 hour and 72 hours. The phase formation behaviors of these mechanically alloyed powders were examined using X-ray diffraction(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), and differential thermal analysis(DTA). Appreciable amorphization started from 6 hours of MA. The powders mechanically alloyed for 10 hours were in almost amorphous phase. DTA results showed that the powders mechanically alloyed for 12 hours had a strong exothermic peak about, whereas the powders mechanically alloyed for 6 hours had two exothermic peaks. The first peak was found to be due to the stress relief effect and the second one due to the formation ofphases by crystallization.
4,000원
6.
1996.03
구독 인증기관 무료, 개인회원 유료
The effect ofgas sintering atmosphere on the carbon content and mechanical properties during the metal injection molding process of carbonyl iron-nickel powder was studied. The carbon content of the specimen after debinding in the pureatmosphere appeared 0.78 wt%. After showing the maximum value of 1.48 wt.% in the debinding atmosphere of 10%gas mixture, the carbon content of the debinded specimen decreased gradually with increasing thecontent in thegas mixture. The carbon contents of the sintered specimen were 0.46~0.63wt% in Na gas atmosphere, while they appeared extremely low above 40%gas atmosphere. The relative sintered density increased abruptly from 88~90% to 93~96% with the addition of Ni, while the density nearly unchanged above 2% Ni addition. The sintered density increased with increasing the fraction ofgas mixture. Tensile strength and hardness increased, and elongation decreased with increasing carbon and Ni content. In spite of high carbon content of 0.63 wt%, the superior elongation value of 10% was shown.
4,000원
7.
1996.03
구독 인증기관 무료, 개인회원 유료
3,000원
8.
1996.03
구독 인증기관 무료, 개인회원 유료
4,000원
