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Topic Area: Materials Science

Displaying records 351 to 360 of 526 records.
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351. Ultrathin Adhesives: Confinement Effect on Modulus
Topic: Materials Science
Published: 2/15/2009
Authors: Jessica M. Torres, Christopher M Stafford, Bryan D. Vogt
Abstract: In this work, we will employ this wrinkling metrology to extract the modulus of polymer thin films for a homologous series of poly(n-alkyl methacrylate)s. In particular, we take advantage of the decrease in Tg as the alkyl chain length increases for ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900945

352. Effect of specimen orientation and extrusion welds on the fatigue life of an AA6063 alloy
Topic: Materials Science
Published: 2/13/2009
Author: Nicholas Nanninga
Abstract: The effect of specimen orientation and extrusion seam welds on the fatigue life of specimens milled from a hollow AA6063 alloy extrusion profile have been characterized in the form of S-N curves. The fatigue behavior of the fully recrystallized AA60 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901721

353. ADVANCED NON-DESTRUCTIVE HYDROGEN SENSORS TO PREVENT MATERIAL DEGRADATION FROM HYDROGEN DAMAGE
Topic: Materials Science
Published: 1/5/2009
Authors: Angelique N Lasseigne, Kamalu Koenig, David Olson, Brajendra Mishra, Joshua Jackson, Thomas Allen Siewert, Joseph David McColskey
Abstract: New higher strength pipeline steels (X100 and X120) exhibit lower tolerance for hydrogen (diffusible and formed hydrides) before significant degradation or failure occurs. It is essential to have advanced sensors to monitor the hydrogen content and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854112

354. Adhesive bonding to dentin improved by polymerizable cyclodextrin derivatives
Series: Journal of Research (NIST JRES)
Topic: Materials Science
Published: 1/5/2009
Authors: Rafael L. Bowen, Gary Edward Schumacher, Anthony Albert Giuseppetti, Kathleen M. Flynn, Charles Martin Guttman, Clifton M. Carey
Abstract: Objectives. Determine bonding characteristics of a hydrophilic monomer formulation containing PCDs (Polymerizable Cyclodextrin Derivatives). The hypothesis was that a formulation containing hydrophilic cross-linking diluent comonomers and PCD molecul ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854114

355. Inducing analytical orthogonality in tungsten oxide-based microsensors using materials structure and dynamic temperature control
Topic: Materials Science
Published: 1/4/2009
Authors: Kurt D Benkstein, Baranidharan Raman, David L. Lahr, John E Bonevich, Stephen Semancik
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902372

356. Comparison of Wavelet Transform and Choi-Williams Distribution to Determine Group Velocities for Different Acoustic Emission Sensors
Topic: Materials Science
Published: 12/31/2008
Author: Marvin Arnold Hamstad
Abstract: Acoustic emission (AE) sources in a plate generate dispersive Lamb waves. In this research, pencil lead breaks (PLBs) were made on an edge of a 3.1 mm thick aluminum alloy plate to generate such AE waves. The PLBs were made near the plate midplane an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901059

357. MATRIX RELAXATION AFTER FRACTURE IN A TOUGHENED EPOXY
Topic: Materials Science
Published: 12/10/2008
Authors: Aaron M Forster, Cyril Clerici, Donald Lee Hunston
Abstract: An efficient method to increase the Mode I fracture energy of a polymer adhesive is to incorporate a rubbery phase within the glassy matrix. In general, the failure surface of a toughened polymer is characterized by cavitated rubber particles and pl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901140

358. Self-Assembly in a Polymer Matrix and its Impact on Phase Separation
Topic: Materials Science
Published: 11/11/2008
Authors: Jack F Douglas, Jacek Dudowicz, Karl Freed
Abstract: Molecular self-assembly often occurs in the presence of long chain polymers, and we develop a theory to describe the competition between self-assembly and phase separation that gen- erally occurs in these complex uids. The theory includes a descr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854076

359. MATERIALS SCIENCE: Nanoscale Polymer Processing
Topic: Materials Science
Published: 10/31/2008
Authors: Christopher L Soles, Yifu Ding
Abstract: Plastics are ubiquitous in our modern world. It difficult to find a manufactured object that does not contain at least some sort polymeric (plastic) components. This ubiquity, in large part, reflects the ease with which polymers can be formed at lo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854472

360. Cooling Mode Fault Detection And Diagnosis Method For A Residential Heat Pump
Series: Special Publication (NIST SP)
Report Number: 1087
Topic: Materials Science
Published: 10/17/2008
Authors: Minsung Kim, Seok H. Yoon, William V Payne, Piotr A Domanski
Abstract: Performance characteristics of a R410A residential unitary split heat pump equipped with a thermostatic expansion valve (TXV) were investigated in the cooling mode under no-fault and faulty conditions. An automated method of steady-state detection w ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861650



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