A influência da composição de alumínio/alumina nas propriedades mecânicas de peças feitas a partir da técnica de reaction bonding com abordagem de weibull

Abstract

The challenge in find new options to attempt the electronic industry demand, allowed us to investigate new technologies, mainly related to thermal performance. Conventional heat transfer systems are being replaced by biphasic ones, as heat pipes as LHP and CPL. This study aims to analyze the mechanical behavior in ceramic structures, mainly composed by Al/Al2O3, considering the aluminum composition variance, wherever will obtain the structures through reactive sintering using the RBAO technique. Therefore, to establish the mechanical properties of the material, the characterization of the samples are based on test bending 3 points, apparent porosity and bulk density, and for the m and σ0 parameters the Weibull approach will be used. Lastly, will be made a statistical analysis of the data for the credibility of the difference obtained values and validate the test blending 3-points made twice in the same sample. The results shows that the addition of aluminum in different composition decrease the values of Weibull approach (m), indicating that the material becomes less homogeneous, and the value of the characteristic voltage (σ0) of the ceramic body produced according to the processing made, increased when the aluminum content composition ranged from 30% to 40%, and had reduced when the percentage of aluminum ranged from 40% and 50%.