In this study, Mg-Sn alloys were produced with the addition of Sn to Mg Powder at di erent ratios through the Powder Metallurgy (P/M) method. A new mixing technique was used in the production to avoid the disadvantages of high reactivity speci c to Mg Powders. The prepared Powder mixtures were turned into components by processing through hot pressing. The produced components were characterized by density measurements, microstructure examinations, and mechanical tests. The density measurements were made according to the Archimedes principle. The microstructural characterization was performed by X-Ray Di raction (XRD) analysis, Scanning Electron Microscope (SEM) investigations, and Energy Dispersive Spectrometry (EDS) analyses. The hardness measurements and tensile tests were used for determining mechanical properties. Densities close to the theoretical density were obtained in the produced parts. XRD and SEM investigations showed that the components produced were composed of -Mg and Mg2Sn phases of the microstructure consisting of coaxial grains. The rising Sn content increased the amount of discrete Mg2Sn precipitates at grain boundaries, thereby ensuring higher hardness and strength values.

Because of some special properties such as high melting point and hardness manufacturing of tungsten parts is very difficult by some processes such as machining, casting, etc. An alternative method for making these parts is Powder Metallurgy technique. Because of some limits in Powder Metallurgy technique the explosive compaction method was applied for compaction of tungsten Powder. At first the Powder Metallurgy and explosive compaction processes were explained in this paper. Already, these two methods were applied for manufacturing of several samples using tungsten Powder. All of samples have a cylindrical shape with 3 mm length and 20 mm diameter. In order to compare the mechanical and metallurgical properties of these samples, the density and hardness were determined and fracture surface of cross sectional area of them were analyzed by scanning electron microscope (SEM). The results indicated that the higher density (10% higher) and hardness (75% higher) for tungsten products can be obtained by explosive compaction method.

In this research, thermal expansion behavior of aluminum-matrix composites reinforced by SiC particles up to 500°C was investigated. For this purpose, thermal analysis equipments were utilized. The main objective is to explain thermal expansion behavior of aluminum-matrix composites reinforced by different percentages of SiC alongside the effect of reinforcement particles on thermal behavior of these materials that are used as base materials in electronic industries. Composites with different percentages of reinforcement (containing 10, 15, 20, and 25%) and different meshes (45, 100, and 150 m) of SiC reinforcement particles and Al-4%Cu alloy matrix were prepared by Powder Metallurgy. Instant coefficient of thermal expansion which is a function of temperature was compared based on Turner's model and Shapry model with predictions from thennoelastic models. Thermal expansion behavior depends on various parameters such as microstructure, matrix deformation, and internal stresses. Dependence of copper-in- aluminum solution on temperature has a significant effect on thermal expansion coefficient of Al-4%Cu alloy matrix and hence thennal behavior of the composite. Results of the experiments performed on the composites reveal that with increase of percentage of silisium carbide ceramic particles, the amount of thermal expansion coefficient decreases.

The main aim of this research was to find the mechanism for the failure of the CoCrMo porous nanocomposite by characterizing microstructural changes and fractured surface after compression test. For this purpose, porous nano-composites were prepared with the addition of bioactive glass nano-Powder to Co-base alloy with 22. 5% porosity by the combination of space-holder and Powder Metallurgy techniques. The micrographs of samples showed that porous nano-composites had the micro and macro pores including open and closed pores. The observed fracture surface in the triple conjunction of sintered Powders indicated a complex of intergranular and transgranular fracture mechanisms. The brittle carbide phase related to the higher solute content (Cr and Mo) precipitated at grain boundaries, leading to the intergranular fracture mechanism and transgranular mechanism that was due to the phase transformation during compression test.

The predominant method to produce ZAMAK alloys is casting. But this process is not without flaws. Factors such as low melting temperature, creep stresses, aging, and dimension change over time are the main problems in ZAMAK’, s casting process. We embarked on this research to investigate the new production routes. In this regard, the Powder Metallurgy can be highlighted because of the non-occurrence of melting and non-solid-liquid phase changes. ZAMAK 2 and 3 are the most commonly used ZAMAK alloys. In this way, we study the comparison of ZAMAK 2 and 3 produced by Powder Metallurgy. The Powder was prepared by the mechanical method. As we proceed, the effect of particle size, pressure, and sintering temperature will be investigated. The comparison was done in consideration of mechanical properties such as density, tensile strength, and hardness. The density of ZAMAK 2 obtained by the Powder Metallurgy method increases with increasing working pressure up to 400 MPa, but after this pressure, little change in density is observed. While in ZAMAK 3 the density increases with increasing pressure. The maximum ultimate stress obtained in ZAMAK 2 is approximately equal to 300 MPa, while, it is equal to 230 MPa for ZAMAK 3. In ZAMAK 2, we will see a 16. 7% increase in density by selecting fine grains, but in Zamak 3, this enhancement is only equal to 7%, which indicates the intensive effect of particle size on the density obtained in ZAMAK 2.

Functionally graded materials (FGM) are a new type of composites with non-homogenous microstructure, which their physical and mechanical properties vary in the thickness direction continuously. In the past two decades many researches in the field of property estimation, structural and thermal analysis of materials have been targeted. Different mechanical, physical and thermo-dynamical properties can be expected from these materials by changing the containing materials volume fraction. In this research, five layered Cu-Fe FGM specimens were fabricated with changing stepwise in the layers composition between pure copper and pure iron by Powder Metallurgy method. First the metal Powders were compressed by press in high pressures and then the green specimens were sintered in a proper furnace was used to improve the layers connection and to increase the strength of the specimens. Two press systems containing uniaxial press and cold iso-static press were used in the fabrication of specimens to compare the results. Optical microscope was used to observe the microstructure and the combination of FGM layers. The results of microscopic investigations showed fine connectivity of the layers and Powders and low density of pores in each layer. The produced Cu-Fe FGM specimens were tested in bending and tension to achieve their mechanical properties. The obtained stress-strain curves of these specimens showed enhancement in flexural and tensile strength of Cu-Fe FGM compared with the existing curves for pure copper and iron made by Powder Metallurgy method. Also cold iso-static press was highly more effective than uniaxial press in increasing the strength of specimens.

The tensile behavior of AI-Cu-Mg-Mnalloy matrix composites produced by a Powder Metallurgy process was investigated as a function of particle size and volume fraction in a naturally agedcondition(T4). Microstructural examinationshaveenabledidentificationof particlesandgrain structure of the materials. The results indicated that tensile properties of the composites significantly improved in the yield strength, UTS and elastic modulus, on incorporation of hard, brittle ceramic particles as compared to unreinforced counterparts. On the other hand, ductility decreased considerably due to the brittle ceramic particles. The results were discussed in the light of microstructures.

Powder Metallurgy (PM) is a versatile manufacturing technology widely used for producing diverse metal matrix composites. In this study, PM was employed to fabricate pure magnesium (P Mg) samples, optimizing critical properties such as density (ρ), percent porosity (%P), and microhardness (HV). Unlike previous works, this study uniquely applied a combined Taguchi and ANOVA-based optimization framework to systematically evaluate the influence of three key PM factors: Compaction Pressure (CP), Sintering Temperature (ST), and Sintering Time (St). Experimental runs were designed using Taguchi's L9 orthogonal array, with CP (550, 600, and 650 MPa), ST (455, 525, and 585 °C), and St (30, 45, and 60 minutes) tested at three levels each. The findings revealed that CP level 3 (650 MPa), ST level 2 (525 ºC), and St level 1(30 minutes) were the optimal parameters for maximizing response characteristics. These results represent a significant improvement in density and microhardness compared to prior studies, demonstrating the efficacy of this method in reducing porosity and enhancing the mechanical properties of P Mg. Furthermore, the integration of regression analysis and Pareto visualization provided predictive insights and highlighted the dominant influence of CP on material performance. This approach establishes a reliable methodology for optimizing PM parameters, offering valuable benchmarks for future research and industrial applications.