The investigation of thermal, mechanical and magnetic behaviors of the Cu-11%Al,
Cu-11%Al-3%Ag, Cu-11%Al-10%Mn and Cu-11%Al-10%Mn-3%Ag alloys was made using
microhardness measurements, differential scanning calorimetry, X-ray diffractometry,
scanning electron microscopy, energy dispersion X-ray spectroscopy and magnetic moment
change with applied field measurement. The results indicated that the Mn addition changes
the phase stability range, the microhardness values and makes undetectable the eutectoid
reaction in annealed Cu-11%Al and Cu-11%Al-3%Ag alloys while the presence of Ag does not
modify the phase transformation sequence neither microhardness values of the annealed
Cu-11%Al and Cu-11%Al-10%Mn alloys, but it increases themagneticmoment of this latter at
about 2.7 times and decreases the rates of eutectoid and peritectoid reactions of the former.