in this study, aluminum (al) matrix reinforced with micro-particles (30 µm) and nano-particles (50 nm) boron carbide (b4c) were used to prepare al-2.5%wt., b4c nano-composite and micro-composite, respectively, using mechanical alloying method. the mixed powders were mechanically milled at 5, 10, 15 and 20 hrs. the xrd results indicated that the crystallite sizes of both the micro-composite and ...

Polymer nanocomposites are known to exhibit enhanced mechanical properties compared to neat polymeric system [1]. Fillers can be used as reinforcement in polymer composites for the enhancement of mechanical properties [2]. Reinforced” polymers consist of a polymeric matrix and relatively stiff filler that exhibit a drastic change in modulus or stress at given strain in compare with the pure pol...

Polymer nanocomposites are known to exhibit enhanced mechanical properties compared to neat polymeric system [1]. Fillers can be used as reinforcement in polymer composites for the enhancement of mechanical properties [2]. Reinforced” polymers consist of a polymeric matrix and relatively stiff filler that exhibit a drastic change in modulus or stress at given strain in compare with the pure pol...

Polymer nanocomposites are known to exhibit enhanced mechanical properties compared to neat polymeric system [1]. Fillers can be used as reinforcement in polymer composites for the enhancement of mechanical properties [2]. Reinforced” polymers consist of a polymeric matrix and relatively stiff filler that exhibit a drastic change in modulus or stress at given strain in compare with the pure pol...

In a recent study, nanocrystalline Ti-based alloys were synthesized using mechanical alloying (MA) followed by annealing. The alloying elements Nb or Nb and Zr were added to titanium. The mechanical properties and the corrosion resistance of these materials were investigated and compared with microcrystalline Ti and the TiAl6V4 alloy. An enhancement of the properties due to nanoscale structures...

in the present study, the influence of annealing temperature on mechanical properties and the microstructure of a high manganese austenitic steel (fe-30mn-4al-4si-0.5c) was investigated. x-ray diffractometry, optical and scanning electron microscopy, hardness and tensile tests were used to analyze the relationship between mechanical properties and microstructure after annealing process. the res...

in this research, graphene was synthesized by chemical vapor deposition (cvd) method in atmosphere pressure (14.7 psi). different functionalization method was used for oxidizing of graphene such as acid and alkaline treatments. the functionalized graphene (fg) was characterized by ftir and raman spectroscopy. nanofluid with water and different concentration (0.05, 0.15 and 0.25 wt %) of fg were...

Glass fibers (GF) are the reinforcement agent most used in polypropylene (PP) based composites, as they have good balance between properties and costs. However, their final properties are mainly determined by the strength and stability of the polymer-fiber interphase. Fibers do not act as an effective reinforcing material when the adhesion is weak. Also, the adhesion between phases can be easil...

This paper consolidated the improvements in mechanical properties from the past literature available using Vibratory welding technique. Vibratory welding is a promising method in eliminating the disadvantages experienced by the traditional welding like residual stress due to the electrical energy input which induces vibrations by varying the input parameters voltage, current, amplitude and freq...

Ca3Co4O9 with B4C additions in different proportions (0, 0.10, 0.25, 0.5, and 0.75 wt.%) have been fabricated using the classical solid-state method. Powder XRD patterns displayed that phase is major one all samples. Microstructural observations showed has superficially oxidized, producing liquid B2O3 during sintering, reacting grains to produce bridges between them. In spite of increase porosi...