Sintering and Grain Growth of a Synthetic Forsterite.
Han-YH; Hirota-K; Bradt-RC
For Reference Only At Bureau Libraries :25 pages
Synthetic forsterite (mg2sio4) was prepared from high-purity silica (sio2) and magnesia (mgo) through conventional powder processing methods. Utilizing that ceramic powder, specimens were pressed and then sintered for several time-temperature conditions between 1,400 and 1,650 deg c and systematically investigated for their density and grain growth, as well as for the grain size-density relationship. The phenomenological grain growth equation was applied, from which the kinetic exponent was determined to be 4, a value that is characteristic of grain boundary migration controlled by pore drag. The apparent activation energy for grain growth was 639 +/- 26 kj/mol, which suggests that the pore drag process is related to vapor transport within the pores.
CP; Final Contract Report;
For Reference Only At Bureau Libraries
University of Nevada--Reno