Study the Efffect of Adding Cu on Some Mechanical and Structural Properties of the Ag-Sn Alloy

Abstract

In this Research, four high-copper amalgam alloys have been prepared by melting at 1050oC in an inert atmosphere, with copper content ranging from (14 to 26wt. %). Heat treatment processes were carried out to increase phases homogeneity and to reduce residual stresses, then, the alloys were mixed with mercury with a ratio of (1:1.2). Several structural measurements were carried out such as x-ray diffraction and microstructure analysis and some mechanical tests such as micro-hardness and compressive strength. X-ray diffraction results show that the amalgams and amalgams alloys have a variety of phases which depends on the copper content in the alloys. On the other hand, results of micro-hardness and compressive strength show that there is a linear increment in the mechanical properties with increasing copper in the amalgam, the results of D (Cu 26%) amalgam was comparable to those measured for the commercial amalgam of ANA that have high mechanical properties.