Abstract: The hierarchical relationships between objects in different levels of an object structure (such as a contract) are stored as elements in two-dimensional matrix representations. In general, the matrix representations facilitate queries, clustering of like objects and contracts, and comparisons that identify common objects and contracts.

Abstract: The hierarchical relationships between objects in different levels of an object structure (such as a contract) are stored as elements in two-dimensional matrix representations. In general, the matrix representations facilitate queries, clustering of like objects and contracts, and comparisons that identify common objects and contracts.

Abstract: An improved kinetic spray nozzle system design is disclosed. The nozzle includes an improved powder injector having an injector tube and a sleeve wherein the injector tube is received in the sleeve and secured to the sleeve. The powder injector further includes an air gap defined between an inner diameter of the sleeve and an outer diameter of the injector tube wherein the air gap is from 50 to 200 microns. The improved injector is capable of spraying a variety of powder materials including hard and “gummy” powders for without clogging for extended periods of time whereas under similar spray conditions previous designs became completely plugged within minutes. The improved injector design enabled the use of higher main gas temperatures to achieve improved coating formation and deposition efficiencies.

Abstract: The present invention is directed to a process for preparing substrates, such as aluminum and aluminum alloy surfaces in heat exchangers, for brazing by depositing thereon a kinetic sprayed brazing composition. The process simultaneously deposits composite particles that include all braze materials, i.e., both filler alloy and brazing flux, and corrosion protection materials used in the brazing of aluminum fins to plates and tubes in a single stage.