Sinterability and characterization of Ag/Al2O3 metal and ceramic matrix composites processed by mechanical milling

Abstract

In this research, the sinterability of Ag/Al2O3 milled powders with 10 and 90 wt%Ag were investigated. The powders were consolidated by two different processes including conventional and spark plasma sintering. The conventionally sintered composites with 90 wt%Ag were further densified by cold pressing and subsequent annealing at 700?C. The microstructural evaluations confirmed a fine dispersion of the constituents within the microstructure of the spark plasma sintered composites. Moreover, the results showed that the relative density, hardness, and flexural strength of the spark plasma sintered samples were much higher than those of the other samples. The hardness and flexural strength of Ag/10 wt%Al2O3 spark plasma sintered samples at 650?C were 146 HV and 264 MPa, respectively. However, unlike the composite with 90 wt%Ag, the applied sintering temperatures have not led to the synthesis of an Ag/90 wt% Al2O3 composite with the desired properties

Investigation of the microstructure-hardness and wear performances of hybrid/composite materials Al2O3/SiC particle reinforced in AA 7075 matrix

“…In this study, on the other hand, in parallel with the study done by Rao and his colleagues, it was found that an increase in hardness value occurred with the increase of the reinforcement material. In a study conducted by Davodi and colleagues [17], Ag/Al 2 O 3 metal matrix composites were fabricated by mechanical milling. They showed that the hardness value (HV) increased with the Al 2 O 3 content.…”

A possible connection between phosphate tungsten bronzes properties and Briggs-Rauscher oscillatory reaction response

“…The crack process in Ca-PWA crystals had followed the appearance of smaller crystals with the average size of several micrometers (~ 2 μm). Concerning Ca-PWB sample, SEM image have shown increased micrometer size (~ 20 μm) due to agglomeration of crystals [33][34][35][36].…”

Processing of the yttria stabilized zirconia-bioactive glass nano composite produced by electrophoretic deposition method

“…Different methods have been developed to apply biocompatible coatings including plasma spray [3][4][5], mechanical milling [6], pulse laser [7][8][9], aerosol [10,11], sol-gel [12,13], electro-deposition [14], pulse electron [15,16], EPD method [17]. These methods can be employed as processing techniques for the fabrication of coatings and small parts with complicated shapes [17].…”