http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Research on Two Sintered Techniques of Nanometer WC-Co Powder
Sun Lan,Jia Chengchang,Tang Hua 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
This paper concerned with SPS (spark plasma sintering), hot pressing of sinter nanometer WC-Co powder and discussed the density, hardness, microstructures and grain sizes of the alloys sintered. The results showed that the two sintered techniques could produce high density alloys and play well on the grain growth, but SPS could lower the sintering temperature and shorten sintering time. Besides, the hardness of the sintered cemented alloys that was dependent on the grain size and densification could also be improved.
Vacuum Carbonization of Nanometer Tungsten Powder with Carbon Black
Luo Ji,Lin Tao,Guo Zhi-meng,Jia Chengchang 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
Vacuum carbonization of nanometer tungsten powder was investigated in a simple designed apparatus. An X-Y recorder was used to plot differential thermal analysis (DTA) curves to determine starting temperature of carbonization of four samples with different specific surface area. The product was detected by X-ray Diffraction (XRD) and small angle X-ray scattering (SAXS). The results show that finer tungsten powder has lower starting temperature of carbonization. Tungsten powder, which BET surface area is , is completely carbonized to tungsten carbide at , although the starting temperature is . Particle grows sharply before carbonization.