The influence of heat treatment parameters on mechanical characteristic of hardness and corrosion of aluminum alloys were studied. The 7xxx series aluminium alloy in rolled state was heat treated in the following conditions: solution treatment at 475+/-5oC for 60 minutes, quenched in water 40-60oC and artificial aging at 120, 150, 180, 210oC at different time of aging (60, respectively 300, 540, 720 minutes). The research consisted in intercrystalline

In this second part of researches the compacted composites was presintering at 400 degrees C/30 minutes and sintering at different temperatures between 520 and 620 degrees C/ 1 hour maintaining, both thermal treatment made in protective atmosphere for achieved advanced matrix homogeneity and maximum densification. Sintered samples were investigated by parallel techniques, in terms of density/ porosity, dimensional changes during sintering and mechanical

This paper reports the outcome of morphological and microcompozitional (SEM, EDS, X-Ray Maps, Compo and Morpho images) and tribological (friction and wear) investigations of iron-copper based composite for automotive brake pads. The sintered friction materials were obtained by conventional P/M route, and compared with a commercial brake pad used as reference material. Experimentally chemical compositions of composites established after a number of

The continuous development of technology in automotive manufacturing process has required new solutions adapted to the growing requirements of lightweight, non-pollution for the environment materials with a low cost production. According with these required characteristics of materials, the aims of this paper were to manufacturing Al-Cu/SiCp composites by powder metallurgy (P/M) processing route and characterization of the powders and compacted/sintered

Quality of metal powders depends on manufacturing process and heat treating parameters. Among the physical, mechanical and structural characteristics of powders, the average particle size, size distribution, particle shape and microstructure of powders are defining characteristics to obtain powders with superior performance. The objective of the present paper is to analyze, using electronic microscopy and image analysis , the particle shape and size

Polyacrylonitryle (PAN) fibers are used on a large scale in textile industry but, some sorts of PAN fibers are valuable precursors for specific carbon fiber (CF) due to their best fitness to the purpose e.g. for high strength CF or for active CF. The application of PAN as precursors of CF is based on its specific structure and texture. Thus, the properties of PAN base CF strongly depend on PAN structure, texture and fiber morphology. In this respect,

A powerful, simple and fast technique for non-destructive multi-element analysis of materials is energy dispersive X-ray fluorescence (EDXRF) technique. This method is based on radioisotope excited energy dispersive X-ray fluorescence (EDXRF) spectrometry and does not require any type-standards. For these reasons, the EDXRF method was chosen in this paper to analyse the different types of stainless steel (SS) samples. After non-destructive multi-element

The material for experiments was an aluminum alloys series 7xxx obtained by thermo-mechanical processing. We studied the influence of different artificial aging parameters on mechanical characteristic and corrosion of Al-Zn-Mg-Cu-alloy. The Al alloys was solution treated at 475 +/- 5 oC for 60 minutes, quenched in water 40-60oC and artificial aging at 120, 150, 180, 210oC at different time of aging (60, respectively 300, 540, 720 minutes). After

A poly(bisphenol A)cyanurate (PCy) network was modified by a hydroxy-terminated oligoester, poly(butylene glycol adipate), PBGA, by polycyclotrimerization of bisphenol A dicyanate in the presence of the oligoester. The modified networks with PBGA content from 5 to 20% (w/w) were characterized by a combination of FTIR, DSC, TMA, TGA, impact testing and sol-gel analysis. It has been established that almost whole of the PBGA was chemically incorporated

The paper presents the experimental results concerning fabrication through powder metallurgy (P/M) of new ecological aluminum matrix composites (AMC) at a low cost for automotive industry applications. The difficult compaction and sintering of aluminum powder products and especially of powders from aluminum composite mixtures reinforced with hard ceramic particles require complex phenomenon's analysis which occurs during materials' fabrication. Thus