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You searched on: Author: andrew allen

Displaying records 31 to 40 of 81 records.
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31. Process-Controlled Plasma-Sprayed Yttria-Stabilized Zirconia Coatings: New Insights from
Published: 2/11/2009
Authors: Y Li, W Chi, S Sampath, A N Goland, H Herman, Andrew John Allen, J Ilavsky
Abstract: A multi-component microstructure model is applied in ultrasmall-angle X-ray scattering (USAXS) studies of the processing microstructure property relationships for two groups of plasma-sprayed yttria-stabilized zirconia (YSZ) thermal barrier coati ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851077

32. Structural Changes to the Calcium Silicate Hydrate Gel Phase of Hydrated Cement with Age, Drying, and Resaturation
Published: 10/8/2008
Authors: J Thomas, Andrew John Allen, Hamlin M Jennings
Abstract: The effects of partial and complete drying on the internal structure of hydrated cement paste were investigated using small angle neutron scattering (SANS). Each specimen was analyzed in the initial saturated state, in the dried state, and then aga ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851119

33. In Situ Ultra-Small-Angle X-Ray Scattering Study of the Solution-Mediated Formation and Growth of Nanocrystalline Ceria
Published: 1/16/2008
Authors: Andrew John Allen, Vincent A Hackley, P R Jemian, Jan Ilavsky, J M Raitano, S W Chan
Abstract: A remote-controlled isothermal circulating fluid flow cell is described and results presented for the in situ ultra-small-angle x-ray scattering (USAXS) study of solution-mediated systems and suspensions. The fluid flow prevents settling out of coars ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850995

34. Composition and Density of Amorphous Calcium-Silicate-Hydrate in Cement
Published: 9/1/2007
Authors: Andrew John Allen, J Thomas, Hamlin M Jennings
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854232

35. Interphase Effects in Dental Nanocomposites Investigated by Small-Angle Neutron Scattering
Published: 9/1/2007
Authors: K S Wilson, Andrew John Allen, N. R. Washburn, Joseph M Antonucci
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854298

36. USAXS-Analysis of Electron-Beam Physical Vapour Deposited Thermal Barrier Coatings and Applications of Void Structure Modelling to Determine the Influence of Process Parameters on the Thermal Conductivity
Published: 9/1/2007
Authors: A Flores Renteria, B Saruhan, J Ilavsky, Andrew John Allen
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854216

37. Versatility and Robustness of Guassian Random Fields for Modeling Random Media
Published: 6/1/2007
Authors: J A Quintanilla, J T Chen, R F Reidy, Andrew John Allen
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854346

38. Interphase Effects in Dental Nanocomposites Investigated by Small-Angle Neutron Scattering
Published: 4/6/2007
Authors: K S Wilson, Andrew John Allen, N Washburn, Joseph M Antonucci
Abstract: Small angle neutron scattering (SANS) was used to assess nanoparticle dispersion morphologies and nanoscale interphase characteristics in polymer composites containing four concentrations of silica nanoparticle fillers (10 %, 25 %, 45 %, and 60 % by ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852527

39. Analysis of C-S-H Gel and Cement Paste by Small-Angle Neutron Scattering
Published: 1/16/2007
Authors: Andrew John Allen, J Thomas
Abstract: The role of small-angle x-ray and neutron scattering (SAXS and SANS) in the characterization of cement is briefly reviewed. The unique information obtainable from SANS analysis of C-S-H gel in hydrating cement is compared with that obtainable by othe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850922

40. Composition and Density of Amorphous Calcium-Silicate-Hydrate in Cement
Published: 1/16/2007
Authors: Andrew John Allen, J Thomas, Hamlin M Jennings
Abstract: Despite intensive research for over a century, the main binding reaction product of cement hydration, calcium-silicate-hydrate (C-S-H) gel, is not fully understood. By combining absolute-calibrated small-angle and ultrasmall-angle neutron and x-ray ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850964



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