NIST logo

Publications Portal

You searched on:
Author: andrew allen

Displaying records 61 to 70 of 73 records.
Resort by: Date / Title


61. The Surface Area of Cement Paste as Measured by Neutron Scattering -- Evidence for Two C-S-H Morphologies
Published: 10/1/1998
Authors: J Thomas, Hamlin M Jennings, Andrew John Allen
Abstract: Small-angle neutron scattering was used to measure the effect of water-to-cement ratio [w/c] and cement batch variation on the surface area of ordinary Portland cement [opc] paste after hydration for 28 days at room temperature, and to measure the de ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850156

62. Multiple Small-Angle Neutron Scattering
Published: 9/1/1998
Authors: Gabrielle Gibbs Long, Susan Krueger, Andrew John Allen
Abstract: Over the past decade, a multiple small-angle neutron scattering (MSANS) formalism has been developed to enable researchers to derive microstructural parameters from multiply-scattered small-angle neutron data. The MSANS formalism is particularly use ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850569

63. Determination of the Neutron Scattering Contrast of Hydrated Portland Cement Paste Using H^d2^0/D^d2^0
Published: 6/1/1998
Authors: J Thomas, Hamlin M Jennings, Andrew John Allen
Abstract: Accurate measurements of the surface area of cement based materials using small-angle neutron scattering (SANS) require determination of the neutron scattering contrast between the C-S-H gel and H6d2^O. Because the C-S-H gel has a poorly understood ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850238

64. Anisotropic Microstructure of Plasma-Sprayed Deposits
Published: 4/1/1998
Authors: J Ilavsky, Gabrielle Gibbs Long, Andrew John Allen, L Leblanc, M Prystay, C Moreau, Alan H. Band
Abstract: The microstructure of plasma-sprayed deposits [PSD] is dominated by two void systems-interlamellar pores and intralamellar cracks - each with a different anisotropy. Varying anisotropies and crack-to-pore ratios within PSDs are responsible for the a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850157

65. USAXS Studies of Silica Fume Additives in Cements and Concrete
Published: 4/1/1998
Authors: Andrew John Allen, Richard A Livingston
Abstract: Supplementary cementitious materials like silica fume, which are added to the cement mix and react with calcium ions in the pore solution, enhance the production of calcium-silicate-hydrate gel and modify the microstructure in other ways. By combinin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850197

66. Evolution of the Microstructure of Plasma-Sprayed Deposits During Heating
Published: 1/1/1998
Authors: Gabrielle Gibbs Long, Andrew John Allen, J Ilavsky
Abstract: The evolution of the void microstructure of yttria-stabilized zirconia [YSZ] plasma-sprayed deposits [PSD] was studied as a function of heating in air from room temperature to 1400 C, and during a constant temperature hold at 1100 C for 19 hours. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850158

67. Advanced Neutron and X-Ray Techniques for Insights Into the Microstructure of EB-PVD Thermal Barrier Coatings
Published: Date unknown
Authors: A Kulkarni, A N Goland, H Herman, Andrew John Allen, T A Dobbins, F DeCarlo, J Ilavsky, S Fang, P Lawton
Abstract: The ongoing quest to increase gas turbine efficiency and performance (increased thrust) provides a driving force for materials development. While improved engine and usage of novel materials provide solutions for increased engine operating temperatur ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850843

68. Characterization of Solid Oxide Fuel Cell Layers by Computed X-Ray Microtomography and Small-Angle Scattering
Published: Date unknown
Authors: Andrew John Allen, T A Dobbins, J Ilavsky, F Zhao, A Virkar, J Almer, F DeCarlo
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850784

69. Microstructural Control and Alignment of Template-Synthesized Gold Nanowires in Suspension
Published: Date unknown
Authors: Andrew John Allen, Vincent A Hackley, R Liu, S B Lee, Jan Ilavsky
Abstract: We use ultrasmall-angle X-ray scattering to measure the diameter size distributions of Au nanowires in suspension. Au nanowires are synthesized by electrodeposition in a well-ordered alumina template. The diameter distribution is quantitatively corr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851097

70. USAXS-Analysis of Electron-Beam Physical Vapour Deposited Thermal Barrier Coatings and Application of Void Structure Modelling to Determine the Influence of Process Parameters on the Thermal Conductivity
Published: Date unknown
Authors: A Flores Renteria, B Saruhan, J Ilavsky, Andrew John Allen
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850952



Search NIST-wide:


(Search abstract and keywords)


Last Name:
First Name:







Special Publications:

Looking for a NIST Special Publication (NIST SP Series)? Place the series number and dash in the report number field (Example: 800-) and begin your search.

  • SP 250-XX: Calibration Services
  • SP 260-XX: Standard Reference Materials
  • SP 300-XX: Precision Measurement and Calibration
  • SP 400-XX: Semiconductor Measurement Technology
  • SP 480-XX: Law Enforcement Technology
  • SP 500-XX: Computer Systems Technology
  • SP 700-XX: Industrial Measurement Series
  • SP 800-XX: Computer Security Series
  • SP 823-XX: Integrated Services Digital Network Series