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You searched on: Topic Area: Materials Science

Displaying records 511 to 520 of 548 records.
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511. Estimation of Process Stability in the MAG Welding Process by Monitoring the Welding Parameters
Topic: Materials Science
Published: 11/1/2001
Author: Thomas Allen Siewert
Abstract: This paper presents the distribution of the main welding parameters (welding voltage and welding current) for semiautomatic arc welding with the metal active gas (MAG) process, using both flux- cored and solid electrodes. Two different shielding fas ...

512. NIST Recommended Practice Guide: The Use of Nomenclature in Dispersion Science and Technology
Series: Special Publication (NIST SP)
Report Number: 960-3
Topic: Materials Science
Published: 8/1/2001
Authors: Vincent A Hackley, Chiara F Ferraris
Abstract: This Special Publication is essentially a reprint of two NIST Special Publications, SP 945 and SP 946. This particular Practice Guide provides guidelines for the use of technical and scientific nomenclature related to ceramic dispersions.The use of n ...

513. Workshop on Texture in Electronic Applications
Series: Journal of Research (NIST JRES)
Topic: Materials Science
Published: 5/1/2001
Authors: Mark D Vaudin, Debra L Kaiser
Abstract: A two day workshop on Texture in Electronic Applications was held on October 10-11,2000 at NIST, Gaithersburg. The workshop presented an excellent forum for discussion of a broad spectrum of texture-related issues of interest to academic,government a ...

514. Block Copolymer Thin Films: Physics and Applications
Topic: Materials Science
Published: 2/15/2001
Authors: Michael J Fasolka, A M Mayes
Abstract: A two-part review of research concerning block copolymer thin films is presented. The first section summarizes experimental and theoretical studies of the fundamental physics of these systems, concentrating upon the forces that govern film morpholog ...

515. Texture Plus
Topic: Materials Science
Published: 2/1/2001
Author: Mark D Vaudin
Abstract: TexturePlus is a Win '95 or later software package that analyzes crystallographic texture in bulk and thin film specimens. The software analyzes data obtained on a powder x-ray diffractometer. The required data include an x-ray theta-2theta scan ...

516. Blackman Diagrams and Elastic-Constant Systematics
Topic: Materials Science
Published: 1/5/2001
Author: H M Ledbetter
Abstract: We consider Blackman diagrams for various cubic materials. These diagrams, plots of reduced elastic-stiffness coefficients C^d12^/C^d11^ versus C^d44^/C^d11^, show that materials with similar chemical bonding tend to fall in the same region of the d ...

517. Bulk-Moduli Systematics in Oxides Including Superconductors
Topic: Materials Science
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 ...

518. Elastic Gr neisen Parameters of Cubic Elements and Compounds
Topic: Materials Science
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 ...

519. Metal-Oxide Debye Temperatures and Elastic Constants Estimation From Interionic Spacing
Topic: Materials Science
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 ...

520. Bulk and Surface Evidence for the Long Range Spatial Modulation of X-Ray Absorption in the AlPdMn Quasicrystal at Bragg Incidence
Topic: Materials Science
Published: 1/1/2001
Authors: G Cappello, A Dechelette, F Schmithusen, S Decossas, J Chevrier, F Comin, V Formoso, M. De Boissieu, Terrence J Jach, R. Colella, T Lograsso, C Jenks, D W Delaney
Abstract: An X-ray standing waves experiment was performed at the ID32 beam line of the ESRF on an Al-PD-Mn quasicrystal with the X-ray beam at normal incidence. The X-ray photoemission core levels for each element were recorded to probe the surface. The dra ...

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