نتایج جستجو برای: مورفولوژی mg2si
تعداد نتایج: 5724 فیلتر نتایج به سال:
To evaluate the effect of inoculant addition on functionally graded microstructure of centrifugally cast Al-Mg2Si composites, two cylinders of Al-13.8 wt.% Mg2Si with and without the addition of 1 wt.% Al-5Ti-B inoculant were cast in a vertical centrifugal casting machine. The chemical composition, microstructures and microstructural phases of the different radial sections of the cast cylinders...
In the current study, effect of different B4C additions (0, 2.5, 5, and 10 wt%) on microstructural, solidification behavior, mechanical, tribological properties Al-20%Mg2Si composite were studied by means scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Vickers hardness, tensile, dry sliding wear tests. The cooling curve thermal ana...
In this work, ultrasonic vibration treatment (UVT) was introduced to improve the interfacial microstructure and bonding strength of A356/AZ91D bimetal processed via lost foam compound casting (LFCC). The mechanical properties Al/Mg LFCC with different UVT durations were investigated. Results revealed did not change composition phases at interface. bimetallic interface consisted an intermetallic...
In situ Al2024- Mg2Si composite was fabricated by spark plasma sintering (SPS) of reactive powder. Reactive powder was obtained from mechanical alloying (MA) of elemental powders. Clad layers of in situ composite were fabricated on Al substrates by spark plasma sintering (SPS). Structural evolution during MA process and after SPS was investigated by X-ray diffractometery (XRD). Scanning electro...
In this study, the effect of mechanical alloying on the microstructure and phase constituents of Mg-6Al-1Zn-1Si system was investigated. To understand the thermal behavior, isothermal annealing was performed at three different temperatures of 350, 400 and 450 °C for 1h. The results showed the grain size initially decreases with increasing the milling time up to 35h and then slightly increases. ...
Textured silicon surface structures, in particular black (b-Si), open up possibilities for Si-based solar cells and photodetectors to be extremely thin highly sensitive owing perfect light-trapping antireflection properties. However, near-infrared (NIR) performance of bare b-Si is limited by Si band gap 1.12 eV. This work reports a simple method increase NIR absorption vacuo silicidation with m...
This study aims to investigate the microstructural alterations, mechanical properties, sliding wear behavior, and corrosion properties of Al-15%Mg2Si composites with different contents yttria-stabilized zirconia (YSZ). YSZ (0, 3, 6, 9 wt.%) were fabricated using stir-casting technique. The characterized by means optical microscopy (OM), scanning electron (SEM) equipped energy-dispersive spectro...
در این پژوهش، اثر آلیاژسازی مکانیکی بر ریزساختار و اجزای فازی سیستم mg-6al-1zn-1si بررسی شد. برای مطالعه رفتار گرمایی، آنیل هم دما در سه دمای 350، 400 و °c450 برای یک ساعت انجام شد. نتایج نشان داد که اندازه دانه ابتدا با افزایش زمان آسیاب تا 35 ساعت کاهش و سپس اندکی افزایش می یابد. در مقابل، کرنش شبکه با افزایش زمان آسیاب تا 35 ساعت به طور محسوسی افزایش و سپس کاهش می یابد. فاز ثانویه بین فلزی m...
The effect of chemical composition and the hot rolling operations on the microstructure and mechanical properties of in situ aluminum matrix composite with Mg2Si phase as the reinforcement was studied. It was revealed that the modification by phosphorous results in the rounder (more spherical) primary and secondary (eutectic) magnesium silicide intermetallics. During hot rolling, the primary pa...
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