Michael K Cinibulk - Storming Media

Processing and Testing Re2Si207 Matrix Composites (Preprint)

Jul 2012

11 pages

Authors: Randall S Hay; Michael K Cinibulk; Emmanuel E Boakye; Kristin Keller; Pavel S Mogilevsky; T A Parthasarathy; M Ahrens; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH STRUCTURAL MATERIALS DIV

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In prior work, the synthesis of alpha, beta, and gamma-Re2Si2O7 powders (Re= Y and Ho) at temperatures from 1000 degrees to 1400 degrees C h in air was reported, along with the Vickers hardness of dense gamma-Y2Si2O7 and gamma-Ho2Si2O7 polymorphs. Dense gamma-Y2Si2O7 and & gamma-Ho2Si2O7 pellets were made by a pressureless sintering technique at 1400 degrees C/8h. Using the pressureless sintering technique, densification of alpha and beta-Y2Si2O7 powder compacts at ...

Separating Test Artifacts from Material Behavior in the Oxidation Studies of HfB2-SiC at 2000 degs C and Above (Preprint)

Nov 2011

14 pages

Authors: Carmen M Carney; Triplicane A Parathasarathy; Michael K Cinibulk; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIR METALS CERAMICS & NONDESTRUCTIVE EVALUATION DIV/CERAMICS BRANCH

HfB2-15 vol% SiC prepared by field-assisted sintering was oxidized at 2000 deg. C by heating in a zirconia-resistance furnace and by direct electrical resistance heating of the sample. The morphology and chemistry of the oxide scales were examined and compared. In addition, limitations of the materials and the direct electrical resistance heating apparatus were explored by heating samples multiple times and to temperatures in excess of 2300 deg. C. Oxide ...