http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Hot-pressing으로 제조한 Fe 소결재의 플라즈마 질화 특성
孫珍烈,金樹芳,金容摸,朴允雨 대한금속재료학회 2002 대한금속·재료학회지 Vol.40 No.5
This study was to analyse the relationship between properties of ion nitrided Fe sintered material and parameters of plasma nitriding process. Pure Fe sintered materials (relative density : 92%) were fabricated by hotpressing and nitrided under pulsed DC plasma for 4 hours. The large number of parameters in plasma diffusion treatment allows close control of the process so that surface layers with defined microstructures and properties can be obtained. The number of micropores in nitriding layer can be reduced in pulsed DC plasma by reducing the plasma power and by varying the gas mixture. The phase constitution of compound layer of nitrided Fe sintered material were influenced by gas mixture (N_2: H_2) and pulsed ratio (pulse on/off time ratio).
김진열,김응렬,손대원,Kim, Jin Yeol,Kim, Eung Ryeol,Son, Dae Won Korean Chemical Society 2001 Bulletin of the Korean Chemical Society Vol.22 No.8
Infrared absorption spectra of $\alpha\omega-diphenylpolyenyl$, anions Ph(CH)nPh- (DPn-, n=7, 9, and 13) in the tetrahydrofuran-d6 solutions was measured in the range of 1700 and 1200 cm-1 . The infrared spectra obtained from anions (DPn) showed considerable difference from their neutral species (DPn); their intensities were enhanced at least two orders of magnitude stronger than their neutral species. The in-plane CH bending modes at 1464 and 1375 cm-1 are correspondingly strengthened with the chain length increased, but the C=C stretching at 1541 cm-1 is weakened and frequencies are not changed. We provide an IR evidence for the first time that the bond order or bond alternations of the anions (soliton) are different from those of radical anions (polaron) as well as neutral species.