Sandia Corporation

National Technology & Engineering Solutions of Sandia, LLC

Aaron C Hall

F Michael Hosking

Charles A Walker

Richard C Givler

David P Adams

Mark Reece

Scott H Brooks

Pylin Sarobol

Fredrick Joseph Snoy, Iii

Protective barrier includes a soft metal that inhibits or delays thermal or grinding attack tool penetration. The soft metal, which may be disposed between other layers and otherwise delays thermal attack by expanding or 'puffing' during attack. The soft metal can inhibit mechanical attack by rapid ablation and wear of a cutting wheel or blade. The protective barrier may additionally include an oxide or carbide layer.

Thermal barrier systems and methods for access delay

The present invention relates to solar absorptive coatings including a ceramic material. In particular, the coatings of the invention are laser-treated to further enhance the solar absorptivity of the material. Methods of making and using such materials are also described.

High durability solar absorptive coating and methods for making same

A method for making a braze joint across a discontinuity in a work piece using alternating current. A filler metal is pre-placed at a location sufficiently close to the discontinuity such that, when an alternating current is applied across a work piece to heat the work piece and melt the filler metal, the filler metal is drawn into the discontinuity. The alternating current is maintained for a set residence time, generally less than 10 seconds and more particularly less than 3 seconds. The alternating current is then altered, generally by reducing the current and/or voltage such that the filler metal can solidify to form a braze joint of desired quality and thickness.

Method for controlling brazing

A capillary test specimen, method, and system for visualizing and quantifying capillary flow of liquids under realistic conditions, including polymer underfilling, injection molding, soldering, brazing, and casting. The capillary test specimen simulates complex joint geometries and has an open cross-section to permit easy visual access from the side. A high-speed, high-magnification camera system records the location and shape of the moving liquid front in real-time, in-situ as it flows out of a source cavity, through an open capillary channel between two surfaces having a controlled capillary gap, and into an open fillet cavity, where it subsequently forms a fillet on free surfaces that have been configured to simulate realistic joint geometries. Electric resistance heating rapidly heats the test specimen, without using a furnace. Image-processing software analyzes the recorded images and calculates the velocity of the moving liquid front, fillet contact angles, and shape of the fillet's meniscus, among other parameters.

Growing community of inventors

Albuquerque, NM, United States of America

Aaron C Hall