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You searched on: Author: sudook kim

Displaying records 21 to 30 of 44 records.
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21. Acoustic Damping in Langatate as a Function of Temperature, Frequency, and Mechanical Contact
Published: 10/1/2002
Authors: Ward L Johnson, Sudook A. Kim, Damian S Lauria, R C Smyth
Abstract: Resonant acoustic damping in plano-convex (trapped-mode) langatate (La^d3^Ga^d5.5^Ta0^d0.5^0^d14^) discs was measured at frequencies from 2 MHz to 18 MHz and temperatures from 130 K to 450 K. A broad anelastic relaxation peak was observed in the temp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851324

22. Nanoporous Polymer Film Properties From Brillouin Light Scattering and Surface Acoustic Wave Spectroscopy
Published: 10/1/2002
Authors: Colm Flannery, Sudook A. Kim, T Wittkowski, K Y Jung, B Hillebrands, M R Baklanov
Abstract: Nanoporous Methylsilsesquioxane polymer films have outstanding potential forapplication to microelectronic interconnect, because of their low dielectric constant. Here we show that Brillouin light scattering and surface acoustic wave spectroscopy ma ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851323

23. Elastic Constants of Mullite Containing Alumina Platelets
Published: 7/1/2001
Authors: H M Ledbetter, Sudook A. Kim, Martin Dunn, Z Xu, S Crudele, W Kriven
Abstract: Using dynamic methods, we measured the elastic constants of a composite comprising alumina platelets (0.2 volume fraction) in a 3:2-mullite matrix. Instead of the expected elastic stiffening, we found an elastic softening. For example, the Young mo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851197

24. Bulk-Moduli Systematics in Oxides Including Superconductors
Published: 1/5/2001
Authors: H M Ledbetter, Sudook A. Kim
Abstract: For oxides, including superconductors, we consider the systematics of the bulk-modulus/atomic-volume (B/V^da^) relationship. For nonsuperconducting oxides, the B-V^da^ diagram shows that most oxides fall in three sets: (1) rocksalt crystal structure ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851170

25. Elastic Gr neisen Parameters of Cubic Elements and Compounds
Published: 1/5/2001
Authors: H M Ledbetter, Sudook A. Kim
Abstract: From a material's second-order elastic-stiffness coefficients C^dijkl^ and its third-order elastic-stiffness coefficients C^dijklmn^, we calculated the scalar dimensionless Gr neisen parameter {gamma}, the single most important property of an anharmo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851175

26. Metal-Oxide Debye Temperatures and Elastic Constants Estimation From Interionic Spacing
Published: 1/5/2001
Authors: H M Ledbetter, Sudook A. Kim
Abstract: For cubic metal oxides, we show relationships between crystal-structure-volume properties and elastic-stiffness properties. The interionic distance (or the crystal structure plus volume) gives the bulk modulus {Beta}. The product of effective atom ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851173

27. Bulk-Moduli Systematics in Oxides, Including Superconductors
Published: 1/1/2001
Authors: H M Ledbetter, Sudook A. Kim
Abstract: For oxides, including superconductors, we consider the systematics fo the bulk-modulus/atomic-volume (B/V^d{alpha}^) relationship. For nonsuperconducting oxides, the B-V^d{alpha} diagram shows that most oxides fall in three sets: (1) rocksalt crysta ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851365

28. Metal-Oxide Debye Temperature's and Elastic Constants: Estimation From Interionic Spacing
Published: 1/1/2001
Authors: H M Ledbetter, Sudook A. Kim
Abstract: For cubic metal oxides, we show relationships between crystal-structure-volume properties and elastic-stiffness properties. The interionic distance (or the crystal structure plus volume) gives the bulk modulus B. The product of effective atomic mas ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851171

29. Elastic Stiffnesses of an Nb-Ti/Cu-Composite Superconductive Wire
Published: 9/1/2000
Authors: Sudook A. Kim, H M Ledbetter, H Ogi
Abstract: Elastic-stiffness coefficients were determined on a 1.4-mm-diameter wire consisting of superconducting Nb-Ti fibers in a copper matrix, with a polyvinyl-resin coating. The matrix contained 324 Nb-Ti fibers. An electromagnetic-acoustic-resonance met ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851319

30. Young-Modulus Determination of an Orthotropic Thin Plate in the Through-Thickness
Published: 6/1/1999
Authors: Sudook A. Kim, H M Ledbetter
Abstract: We give a new approach to obtain the Young modulus of a thin orthotropic plate in the through-thickness-direction.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851146



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