Ni coated composite was successfully Prepared by the electroless deposition Process. The average size of Ni particles coated on the matrix powder was about 20 nm. It was hard to find any reaction compound as an impurity at interface between and Ni particles after sintering. The characterization of microstructure crystal structure and fracture behavior of the sintered body were investigated using XRD, TEM and Victors hardness tester, and compared with those of the sintered monolithic body. Many dislocations were observed in the Ni phase due to the difference of thermal expansion coefficient between and Ni phase, and no observed microcracks at their and Ni interface. In the /Ni composite, the main fracture mode showed a mixed fracture with intergranular and transgranuluar type having some ,surface roughness. The fracture toughness was slightly increased due to the plastic deformation mechanism of Ni phase in the /Ni composite.
In this research, we investigate the countermeasure of Product Liability through existing research or books for reference about PL and ISO 9001:2000 quality management system. And we analyze relation between PL system and ISO 9001:2000 Quality Management
본 연구에서는 vitrification방법을 사용하여 돼지 미수정란의 동결-융해시 난자생존능력에 대한특정 동해방지제 사용과 superoxide dismutase(SOD) 첨가의 영향을 검토하고자 수행하였다. 그 결과 미성숙 난자를 ethylene glycol과 DMSO 노출 후 성숙율(M-I에서 19.9%)이 glycerol과 DMSO 노출 후 성숙율(M-I에서 6.5%)보다 더 높았으며 ethylene glycol에 노출 후에는 M-I기로 성숙발달한
In this research, we investigate the countermeasure of Product Liability through existing research or books for reference about PL and ISO 9000:2000 quality management system. And we analyze relation between PL system and ISO 9000:2000 Quality Management System after compare ISO 9000:2000 and ISO 9000:1994. base on this analysis, we integrate the Quality Management System of company and an important factor of PL system in accordance with the product liability law. So we present a general improvable scheme of ISO 9000:2000 quality management system that reduces overlap of quality business and utilize efficiently.
The -zirconium phosphate particles as fine as 20 nm were fabricated through solution technique using and as precursors. Stability of -Zirconium phosphate could be ensured by adding excess phosphoric acid to a stoichiometric composition Instead of using reflux route that resulted in coarsening of particles due to an inevitably long aging. The excess phosphorous incorporated in the crystal could be successfully eliminated afterwards through careful washing. Moreover, heavily agglomerated particles are observed before washing, but fairly dispersed state is found out after washing treatment. Thus, it is found that dispersed state as well as phase stability is ensured through proper washing treatment.