Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University
Abstract
Plasma spark sintering is an effective method for producing nanostructured metal materials. In this process, a graphite die is usually used. The limitation of graphite die is using this die at higher pressure of 100 MPa. In this research, the simultaneous effect of the pressure and type of die (graphite die with a pressure of 40 MPa and Inconel die with a pressure of 250 MPa) on the microstructure and the properties of nanostructured silver in the spark plasma sintering process were evaluated. The first nanostructured powder with a 47nm crystallite was transformed into two nanoscale silver pieces using two different dies and pressures. Changes in the crystallite size of the powder and the bulks, the percentage of dislocations and the strain of the nanostructured silver bulks were calculated using the X-ray diffraction results. Microstructure and micro hardness of samples were also investigated using FESEM and micro hardness tests, respectively.The results indicate that the increase in crystallite size was 6% in a specimen prepared with a graphite die and 40 MPa pressure and reduce 53% in a crystallite size of a sample prepared in an Inconel die with a pressure of 250 MPa. The change in the type of mold and the applied pressure has no effect on the density of the bulk samples, but the hardness of the sample in the case of Inconel die conditions is increased by 40% compared to the sample prepared in graphite die.High temperature pressure tests show superplasticity behavior nanostructured silver at high temperature.
Falak, P., & Ebrahimzadeh, I. (2020). Production of Nanostructured Silver in Graphite and Inconel dies by Spark plasma sintering. Iranian Journal of Manufacturing Engineering, 7(6), 1-7.
MLA
Peyman Falak; Iman Ebrahimzadeh. "Production of Nanostructured Silver in Graphite and Inconel dies by Spark plasma sintering". Iranian Journal of Manufacturing Engineering, 7, 6, 2020, 1-7.
HARVARD
Falak, P., Ebrahimzadeh, I. (2020). 'Production of Nanostructured Silver in Graphite and Inconel dies by Spark plasma sintering', Iranian Journal of Manufacturing Engineering, 7(6), pp. 1-7.
VANCOUVER
Falak, P., Ebrahimzadeh, I. Production of Nanostructured Silver in Graphite and Inconel dies by Spark plasma sintering. Iranian Journal of Manufacturing Engineering, 2020; 7(6): 1-7.
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