Papers by Keyword: Reinforcing Particles

Abstract: During the process of in situ generated particles reinforced aluminum matrix composites, the introduction of the magnetic field can make the melt a forced movement, promoting changes in the conditions of melt dynamics, and thus plays the role in refining particles, changing the morphology and distribution. And particle size and distribution both are important factors affecting mechanical properties of the composite. Therefore, the introduction of the magnetic field can effectively improve the performance of composite materials. In this experiment, Al-K2TiF6 is used as reaction system to study the influence of combined rotating magnetic field on the microstructure of aluminum matrix composites, which can optimize the preparation process of aluminum matrix composites in the combined magnetic field.

Abstract: Natural porous materials, like wood or bone, are multiscale cellular composite structures which exhibit mechanical (such as elasticity and strength) and functional (such as the thermal or acoustic insulating properties) behaviors dependent on the measuring direction. They show the best performance/weight ratio among all materials because their response is optimized in the needed direction by removing matter where not strictly functional, giving as a result a strong structural as well as morphological anisotropy. A new approach has been developed to mimic this behavior in polymeric foams, in which the mechanical and/or functional response of the cellular structure is tailored in a specific direction through the control of the spatial distribution and configuration of reinforcing particles. In order to demonstrate the concept, polymeric foams were produced with micro- or nano-sized reinforcement distributed along specific directions by means of the magnetic field. The effects of particles content, production parameters, and magnetic field strength were investigated and related to the mechanical (both elastic and magneto-elastic) performances.

Abstract: Particulate reinforced Ti based metal matrix composites (MMCs) were made by in-situ synthesis using vacuum arc re-melting process. The microstructure of the Ti-6Al-4V base alloy and 10 vol.% (TiB+TiC)/Ti-6Al-4V metal matrix composites was examined. The particulate reinforcements were analysed and identified TiB and TiC particles. The particle distribution was analysed using the quadrat method over 1620 quadrats. A homogeneous particle distribution was found to establish in the composites. The experimental distribution of the reinforcements agreed well with the theoretical Poisson distribution. A skew factor, which characterizes the degree of asymmetry of a statistical distribution, of 1.108 was determined for the particle distribution in the material.