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You searched on: Author: andrew allen Sorted by: title

Displaying records 1 to 10 of 81 records.
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1. 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 ...

2. Advanced Neutron and X-ray Techniques for Insights into the Microstructure of EB-PVD Thermal Barrier Coatings
Published: 6/25/2006
Authors: A Kulkarni, A N Goland, H Herman, Andrew John Allen, T A Dobbins, F DeCarlo, J Ilavsky, Gabrielle Gibbs Long, S Fang, P Lawton

3. Agglomerate Formation During Drying
Published: 2/1/2003
Authors: A Vertanessian, Andrew John Allen, M J Mayo
Abstract: The evolution of agglomerate structure during drying of particles from suspension has been studied for a nanocrystalline Y2O3 (8 mol %)-stabilized ZrO2 powder. Agglomerates in drying and dried suspensions were examined at the smallest size scales ( ...

4. Analysis of C-S-H Gel and Cement Paste by Small-Angle Neutron Scattering
Published: 12/7/2005
Authors: Andrew John Allen, J Thomas

5. 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 ...

6. 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 ...

7. 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 ...

8. Annealing Behavior of Atomic Layer Deposited HfO2 Films Studied by Synchrotron X-Ray Reflectivity and Grazing Incidence Small Angle Scattering
Published: 6/30/2009
Authors: Martin L Green, Andrew John Allen, J. L. Jordan-Sweet, Jan Ilavsky
Abstract: New results are presented for the annealing behavior of ultrathin complementary-metal-gate-semiconductor (CMOS) gate-dielectric (high-) HfO2 films grown by atomic layer deposition (ALD). A series of ALD HfO2 dielectric films has been stu ...

9. Challenges for Physical Characterization of Silver Nanoparticles Under Pristine and Environmentally Relevant Conditions
Published: 3/17/2011
Authors: Robert I. MacCuspie, Kim Rogers, Manomita Patra, Zhiyong Suo, Andrew John Allen, Matthew N. Martin, Vincent A Hackley
Abstract: The conditions used to disperse silver nanoparticles (AgNPs) strongly impact their resulting size measurements and agglomeration state, based on the underlying metrology and physical chemistry, respectively. A series of AgNP materials with reported ...

10. Characterisation of Thermally Sprayed Metallic NiCrAlY Deposits by Multiple Small-Angle Scattering
Published: 12/1/2002
Authors: T Keller, W. Wagner, Andrew John Allen, J Ilavsky, S Siegmann, N Margadant, G Kostorz
Abstract: The technique of multiple small-angle neutron scattering (MSANS), so far successfully applied to thermal-spray ceramics, has now been extended to thermal-spray metallic deposits. The samples under investigation are technologically relevant Ni-based ...

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