Take a sneak peek at the new NIST.gov and let us know what you think!
(Please note: some content may not be complete on the beta site.).

View the beta site
NIST logo

Publications Portal

You searched on: Author: andrew allen

Displaying records 61 to 70 of 81 records.
Resort by: Date / Title

61. Fracture of a Textured Anisotropic Ceramic
Published: 9/1/2001
Authors: M H Zimmerman, D M Baskin, K T Faber, Lin-Sien H Lum, Andrew John Allen, D T Keane
Abstract: The role of crystallographic texture in determining the fracture behavior of a highly anisotropic ceramic, iron titantate, has been examined. By exploiting the anisotropy in its single crystal magnetic susceptibility, crystallographically textured a ...

62. Microstructural Characterization Studies to Relate the Properties of Thermal Spray Coatings to Feedstock and Spray Conditions
Published: 9/1/2001
Authors: Andrew John Allen, Gabrielle Gibbs Long, H Boukari, J Ilavsky, A Kulkarni, S Sampath, H Herman, A N Goland
Abstract: This paper reports how the microstructural information, obtainable for thick plasma-sprayed ceramic deposits by small-angle scattering can be used to explore the relationships among the feedstock or spray process conditions, the anisotropic void and ...

63. The Ultra-Small-Angle X-Ray Scattering Instrument on UNICAT at the APS
Published: 10/1/2000
Authors: Gabrielle Gibbs Long, Andrew John Allen, J Ilavsky, P R Jemian, P Zchack
Abstract: A new ultra-small-angle X-ray scattering (USAXS) instrument has been commissioned as part of the UNICAT facility on the 33-ID line at the Advanced Photon Source. The instrument offers continuously-tunable optics for anomalous USAXS, 1000 times the t ...

64. Microstructural Characterization of Yttria-Stabilized Zirconia Plasma-Sprayed Deposits Using Multiple Small-Angle Neutron Scattering
Published: 5/1/2000
Authors: Andrew John Allen, J Ilavsky, Gabrielle Gibbs Long, Jay S Wallace, C C Berndt, H Herman
Abstract: Density, electron microscopy, elastic modulus, and small-angle neutron scattering studies are used to characterize the microstructures of yttria-stabilized zirconis plasma-sprayed deposits as a function fo both feedstock morphology and annealing. In ...

65. Anisotropic Small-Angle Neutron Scattering Studies of Ceramics
Published: 10/1/1999
Authors: Andrew John Allen, Lin-Sien H Lum, K T Faber, M H Zimmerman, Jay S Wallace
Abstract: This paper discusses how small-angle neutron scattering studies can be applied in two variations to obtain a representative characterization of the large, densely-populated, and anisotropic features that occur in the microstructures of various materi ...

66. Microstructural Changes in YSZ Deposits During Annealing
Published: 3/1/1999
Authors: Andrew John Allen, J Ilavsky, Gabrielle Gibbs Long, Jay S Wallace, C C Berndt, H Herman
Abstract: Various methods have been applied to the microstructural characterization of thermally-sprayed depostis. However, coexisting anisotropic distributions of intra-splat cracks and interlamellar pores, and the broad size range of rounded globular pores, ...

67. The Role of Feedstock Particle Size on the Microstructural Behavior of Plasma-Sprayed YSZ Deposits During Annealing
Published: 3/1/1999
Authors: H Boukari, Andrew John Allen, Gabrielle Gibbs Long, J Ilavsky, Jay S Wallace, C C Berndt, H Herman
Abstract: We have studied the microstructure of thick plasma-sprayed yttrium-stabilized zirconia deposits fabricated from different initial feedstock particle size (32, 47, 56 and 88) m in a series of mulitiple and Porod small-angle neutron scattering experim ...

68. 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 ...

69. Multiple Small-Angle Neutron Scattering
Published: 9/1/1998
Authors: Gabrielle Gibbs Long, Susan T 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 ...

70. 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 ...

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