Iranian Journal of Materials Science and Engineering

• Synthesis and careful analysis of the crystal structure are presented
• Qualitative study of the surface morphology is reported
• Magnetic response analysis is performed
• Theoretical study of the band and electronic structures of the material is carried out and its semiconductor properties are evaluated
• Energy gap through optical measures is obtained

• We have studied the effects of spray parameters on phase composition and microstructure of YSZ thermal barrier coatings made by SPPS process.  
• The effect of plasma power, kind of precursor atomizing gas, atomizing gas flow rate, substrate preheating temperature and spray distance on phase composition and microstructure have been studied.
• Findings showed that the above mentioned parameters have an important role on microstructure and phase composition of coatings.

• The compound layer consisted of mostly dual Fe₄N and Fe_2-3N phases.
• Increase in treatment temperature improved the formation of both Fe₄N and Fe_2-3N phases, while processing time progression only enhanced the formation of Fe₄N phase.
• A linear trend was found between diffusion layer thickness and square root of its nitridation time, suggesting a diffusion controlled process

•  Cyclic flaring and sinking (CFS) as an efficient severe plastic deformation (SPD) method is

employed to produce the ultrafine-grained (UFGed) pure copper tubes.

•  The significant improvement occurs in the fatigue life, yield, and ultimate stress after the CFS

process due to gain refinement.

• The dominant grain refinement mechanism is introduced in the UFG copper tubes. This model

illustrates the procedure of the fragments original coarse grains and refines the microstructure to
ultrafine grained

• The pipeline design has 800,429 m² for surface ranging value.
• The result of theoritical calculation presents specimen 1 with value 1,89 x 10^-3 A(DC), specimen 2 presents 1,175 x 10^-3 A(DC) and specimen 3 shows  6,256 x 10^-4 A(DC).
• The result of experiment by specimens test shows specimen 1 with value 1,91 x 10^-3 A(DC), specimen 2 shows 1,14 x 10^-3 A(DC) and specimen 3 presents 6,2 x 10^-4 A(DC).
• The design of Transformer Rectifier needs 45 Volt (DC), current 10 A(DC) with loaded work 70%.

• High flexibility of carbon braided fiber and high strength of carbon nanofibers in the composites improved the stress level at fracture
• Theoretical and Experimental values are comparably closer
• More energy is needed to break the nanoparticle samples
• Heavy quantity and poor dispersion of nanoparticles lead to agglomerations

• Higher current density (pH value) makes suitable condition for anomalous deposition.
• Lower grain size would obtain at higher current densities.
• Microstructural variation is affected by deposition current density and pH value.
• Saturation magnetization of the coatings was proportion to deposited iron content.
• Coercivity was changed by chemical composition, microstructure and grain size.

• The Al-SiC_p-Gr composites were fabricated by stir-casting technique.
• The pin-on-disc wear testing machine was used to investigate the wear rate by design of experiments based on L₂₇ using Taguchi technique.
• Sliding distance was the most important variable that influenced the wear rate followed by sliding speed and applied load.
• The worn out surfaces were analyzed by SEM and EDS to study the subsurface mechanism of wear.
• The addition of reinforcements showed improved tribological behavior of the composite than base alloy.