화학공학소재연구정보센터
Materials Science Forum, Vol.426-4, 4265-4270, 2003
Integrated P/M processing for system design of nanocrystalline ceramics
This article briefly describes the integration of the solid state powder processing by which one can provide a way of the systems design on bulk nanocrystalline ceramics in wide-spread applications. The rotating-arm reaction ball milling equipped with a PSZ tank realizes the efficient and high quality powder synthesis of amorphous PSZ-xmol%Al2O3 With x=20, 33 and 45 without an external Fe content. The millimeter wave sintering with multi-variable control is used to characterize the densification in the amorphous powder compact under a high frequency electric field by the relatively low activation energy. The spark pressure sintering; causes a decrease in temperature necessary for full densification with decreasing height for the amorphous ZrO2-20mol%Al2O3 product. Then, the thermo-mechanical nanoprocessing with current discharging enables to derive the strain rate sensitivity exponent for high-speed superplastic forming in nanocrystalline PSZ-20mol%Al2O3.