Search results for: A. Paganotti

Items from 1 to 14 out of 14 results

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Phase stability in the Cu-9wt%Al-10wt%Mn-3wt%Ag alloy

C.M.A. Santos, A.T. Adorno, A. Paganotti, C.C.S. Silva, more

Journal of Physics and Chemistry of Solids > 2017 > 104 > C > 145-151

The phase stability in the Cu-9wt%Al-10wt%Mn-3wt%Ag alloy was analyzed using differential scanning calorimetry (DSC), X-ray diffractometry (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), optical microscopy (OM) and microhardness measurements with quenching temperature. The results showed that the presence of silver alters the phase stability...

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Precipitation hardening in the Cu–11wt.%Al–10wt.%Mn alloy with Ag addition

R.A.G. Silva, A. Paganotti, A.T. Adorno, C.M.A. Santos, more

Journal of Alloys and Compounds > 2015 > 643 > Supplement 1 > S178-S181

In this work the precipitation hardening in the Cu–11wt.%Al–10wt.%Mn alloy with Ag addition was studied using different experimental techniques. The results indicated that the hardening on ageing of the Cu–11wt.%Al–10wt.%Mn alloy is only due to bainite precipitation, while in the Cu–11wt.%Al–10wt.%Mn–3%Ag alloy three reactions in sequence can occur, including the bainite precipitation.

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Characteristics of the Cu–18.84 at.%Al–10.28 at.%Mn–1.57 at.%Ag alloy after slow cooling from high temperatures

R. A. G. Silva, A. Paganotti, A. T. Adorno, C. M. A. Santos, more

Journal of Thermal Analysis and Calorimetry > 2015 > 121 > 3 > 1233-1238

The characteristics of the Cu–18.84 at.%Al–10.28 at.%Mn–1.57 at.%Ag alloy after slow cooling from high temperatures were studied using optical and scanning electron microscopies, microhardness measurements with temperature, differential scanning calorimetry, X-ray diffraction, magnetic moment changes with temperature and applied field. The results indicated the presence of a new transition associated...

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Ag-rich precipitates formation in the Cu–11%Al–10%Mn–3%Ag alloy

R.A.G. Silva, A. Paganotti, L. Jabase, A.T. Adorno, more

Journal of Alloys and Compounds > 2014 > 615 > Supplement 1 > S160-S162

The formation of Ag-rich precipitates in the Cu–11%Al–10%Mn–3%Ag alloy initially quenched from 1123K was analyzed. The results showed that nanoprecipitates of a Cu-rich phase are produced at about 523K. In higher temperatures these nanoparticles grow and the relative fraction of Ag dissolved in it is increased, thus forming the Ag-rich phase.

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Effect of Ag addition on phase transitions of the Cu–22.26at.%Al–9.93at.%Mn alloy

R.A.G. Silva, S. Gama, A. Paganotti, A.T. Adorno, more

Thermochimica Acta > 2013 > 554 > Complete > 71-75

The phase transitions that occur in the Cu–22.26at.%Al–9.93at.%Mn and Cu–22.49at.%Al–10.01at.%Mn–1.53at.%Ag alloys after slow cooling were studied using differential scanning calorimetry at different heating rates, microhardness changes with temperature, magnetization changes with temperature, scanning electron microscopy and energy dispersion X-ray spectroscopy. The results indicated that the presence...

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Investigation of thermal, mechanical and magnetic behaviors of the Cu-11%Al alloy with Ag and Mn additions

R.A.G. Silva, A. Paganotti, S. Gama, A.T. Adorno, more

Materials Characterization > 2013 > 75 > Complete > 194-199

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...