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Investigation of discontinuously reinforced aluminium metal matrix composite fabricated by two different micron ceramic reinforcements (ZrSiO4 , B4 C): Comparative study
,
Article
Kovove Materialy
;
Volume 53, Issue 3
,
2015
,
Pages 139-146
;
0023432X (ISSN)
; Akbari, M. K
; Abdizadeh, H
; Pakseresht, A. H
; Abdi, F
; Shahbazkhan, A
;
Sharif University of Technology
Slovenska Akademia Vied
2015
Abstract
The focus of this research is on the fabrication of aluminium-B4 C and aluminium-ZrSiO4 composites by vortex method as a liquid phase process of metal matrix composites. SEM observations show that reinforcement particles are dispersed homogeneously throughout the aluminium matrix. Density, mechanical properties such as hardness and tensile strength of Al base MMCs containing different volume fractions (5, 10 and 15 %) of micro-reinforcements are examined separately and compared with those of monolithic aluminium. Results show that mechanical properties of samples are noticeably higher than those of the monolithic aluminium. The optimum amount of reinforcement in this...
Effect of Ca2+ additives on morphology, composition and corrosion resistant of Zn-12%Ni phosphate coating
, Article Journal of Materials Research and Technology ; Volume 5, Issue 4 , 2016 , Pages 327-332 ; 22387854 (ISSN) ; Hanaei, A ; Pakseresht, A. H ; Shahbazkhan, A ; Parvini Ahmadi, N ; Baniasadi, F ; Sharif University of Technology
Elsevier Editora Ltd
Abstract
The aim of this study is to investigate the effect of phosphate solution with Ca2+ additives on weight, surface morphology and electrochemical behavior of phosphated Zn-Ni film. In order to characterize structure and morphology of surface, X-ray diffraction (XRD) and scanning electron microscopy (SEM) were applied, respectively. Results showed that the main composition in produced coatings was hopeite Zn3(PO4)2·4H2O, which has high corrosion resistance. On one hand, in the presence of Ca2+ cations in solution, the weight of phosphate coating decreased, but on the other hand surface uniformity and corrosion resistance of the coating increased
Effects of Sr and Mg dopants on biological and mechanical properties of SiO2–CaO–P2O5 bioactive glass
, Article Ceramics International ; Volume 46, Issue 14 , 2020 , Pages 22674-22682 ; Moradi, M ; Abouchenari, A ; Pakseresht, A.H ; Esmaeilkhanian, A ; Shokouhimehr, M ; Shahedi Asl, M ; Sharif University of Technology
Elsevier Ltd
2020
Abstract
In the present study, the effects of Sr and Mg were investigated on mechanical and biological properties of 58S bioactive glass (BG). SiO2-P2O5-CaO BG with different contents of Sr and Mg were synthesized via the sol-gel method and immersed in simulated body fluid (SBF) for several days to explore their biocompatibility. Precise analyses of the BG using X-ray powder diffraction, scanning electron microscopy, and transmission electron microscopy showed that the Mg-doped BG containing 8 wt % MgO possessed better biocompatibility. It was also found that mechanical properties of the BG could be improved by increasing the amounts of MgO and SrO. Both 5Sr-BG and 8Mg-BG samples did not exhibit any...