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Accession Number DE2012-1044984
Title Hydrostatic Compaction of Microther(reg) HT.
Publication Date Sep 2010
Media Count 20p
Personal Author S. J. Bauer S. T. Broome
Abstract Two samples of jacketed Microtherm1HT were hydrostatically pressurized to maximum pressures of 29,000 psi to evaluate both pressure-volume response and change in bulk modulus as a function of density. During testing, each of the two samples exhibited large irreversible compactive volumetric strains with only small increases in pressure; however at volumetric strains of approximately 50%, the MicrothermHT stiffened noticeably at ever increasing rates. At the maximum pressure of 29,000 psi, the volumetric strains for both samples were approximately 70%. Bulk modulus, as determined from hydrostatic unload/reload loops, increased by more than two-orders of magnitude (from about 4500 psi to over 500,000 psi) from an initial material density of approx. 0.3 g/cc to a final density of approx. 1.1 g/cc. An empirical fit to the density vs. bulk modulus data is K = 492769n(4.6548), where K is the bulk modulus in psi, and n is the material density in g/cm3. The porosity decreased from 88% to approx. 20% indicating that much higher pressures would be required to compact the material fully.
Keywords Bulk density
Hydrostatic pressure

Source Agency Technical Information Center Oak Ridge Tennessee
NTIS Subject Category 46 - Physics
71 - Materials Sciences
Corporate Author Sandia National Labs., Albuquerque, NM.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1302
Contract Number DE-AC04-94AL85000

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