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Sintering and Grain Growth of a Synthetic Forsterite.

Authors
Han-YH; Hirota-K; Bradt-RC
Source
For Reference Only At Bureau Libraries :25 pages
Link
NIOSHTIC No.
10011136
Abstract
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.
Publication Date
19910101
Document Type
CP; Final Contract Report;
Fiscal Year
1991
NTIS Accession No.
NTIS Price
Identifying No.
OFR 36-92
NIOSH Division
WO;
Source Name
For Reference Only At Bureau Libraries
State
NV;
Performing Organization
University of Nevada--Reno
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