Search Results for copper

This article discusses the composition, properties, and behaviors of copper and its alloys. It begins with an overview of the characteristics, applications, and commercial grades of wrought and cast copper. It then discusses the role of alloying, explaining how zinc, tin, aluminum, silicon, and nickel affect the physical and mechanical properties of coppers and high-copper alloys as well as brasses, bronzes, copper-nickels, and nickel silvers. It also explains how alloying affects electrical conductivity, corrosion resistance, stress-corrosion cracking, and processing characteristics.

The Nuclear Waste Management Organization (NWMO) investigates approaches for managing Canada's used nuclear fuel. As part of a larger program investigating concepts of copper coatings, NWMO has begun exploring copper cold spray in collaboration with the National Research Council. Within the coating program, a large variety of copper coating sizes have been investigated, from small corrosion coupons to full-scale used-fuel containers/canisters (UFCs). This chapter demonstrates the successful application of copper coating technology to full-scale geometric representative Mark II UFC mock-up configurations through activities involving powder selection, general coating development, UFC coating optimization, and prototyping.

Copper is often used in the unalloyed form because pure copper is more conductive than copper alloys. Alloying elements are added to optimize strength, ductility, and thermal stability, with little negative effect on other properties such as conductivity, fabricability, and corrosion resistance. This chapter covers the classification, composition, properties, and applications of copper alloys, including brasses, bronzes, copper-nickel, beryllium-copper, and casting alloys. It also examines wrought copper alloys and pure coppers. The chapter begins with an overview of the copper production process and concludes with a discussion on corrosion resistance.

This chapter describes the conditions under which copper-base alloys are susceptible to stress-corrosion cracking (SCC) and some of the environmental factors, such as temperature, pH, and corrosion potential, that influence crack growth and time to failure. It explains that, although most of the literature has been concerned with copper zinc alloys in ammoniacal solutions, there are a number of alloy-environment combinations where SCC has been observed. The chapter discusses several of these cases and the effect of various application parameters, including composition, microstructure, heat treatment, cold working, and stress intensity. It also provides information on stress-corrosion testing, mitigation techniques, and basic cracking mechanisms.

This chapter covers the friction and wear behaviors of copper alloys. It describes the compositions and forms of copper available and their suitability for applications involving friction, different types of erosion, and adhesive and abrasive wear.

This appendix lists copper-containing macroetchants that are used on iron and steel.