Interface Reactions and Synthetic Reaction of Composite Systems

Abstract

Interface reactions in composite systems often determine their overall properties, since product phases usually formed at interfaces during composite fabrication processing make up a large portion of the composites. Since most composite materials represent a ternary or higher order materials system, many studies have focused on analyses of diffusion phenomena and kinetics in multicomponent systems. However, the understanding of the kinetic behavior increases the complexity, since the kinetics of each component during interdiffusion reactions need to be defined for interpreting composite behaviors. From this standpoint, it is important to clarify the interface reactions for producing compatible interfaces with desired product phases. A thermodynamic evaluation such as a chemical potential of involving components can provide an understanding of the diffusion reactions, which govern diffusion pathways and product phase formation. A strategic approach for designing compatible interfaces is discussed in terms of chemical potential diagrams and interface morphology, with some material examples.

Microstructural investigation of the coatings prepared by simultaneous aluminizing and siliconizing process on γ-TiAl

“…However, recent research has shown that the main disadvantage of titanium silicide compounds is its high brittleness [38]. In this investigation, it is decided to study the morphology, microstructure, and phase composition of the layers formed as a result of the simultaneous siliconizing and aluminizing process.…”

Microstructure and mechanical properties of a novel Cu-Fe based matrix for diamond segments

“…The tensile and compressive yield strength of the sintered matrix are influenced by the matrix's microstructure. Firstly, It can be attributed to the solid solution formation which occurs more effectively at higher sintering temperature, although in small amounts and not being read by XRD [1,3] . Secondly, it is due to the grain refining strengthening.…”

“…It does not seem that Co is suitable for every kind of applications, such as natural stone cutting and civil engineering works. Thus, many researchers are now dedicated to research and develop new kinds of metallic binding alloy that could be alternatively used or at least reduce the Co content in the diamond cutting tools binder [3,4] .…”

“…The temperature used for sintering should be below 900 for the risk of attack, dissolution and graphitization of diamond, which would deteriorate the final cutting performance [3] . The diamond grits are bonded to the metallic matrix by means of a combination of chemical reaction and mechanical interactions between the surface of diamond grits and the metallic binder [5] .…”

Efeito Do Processo De Mistura Utlizado Para O Desenvolvimento De Compósitos Diamantados Para Aplicação Em Discos De Corte De Rochas Ornamentais

“…Segundo Zaitsev et al [5] a liga Cu-Ni-Fe-Sn utilizada como base para a matriz metálica nas ferramentas de corte promovem uma forte ligação entre as partículas metálicas e têm um efeito significativo sobre a cinética de sinterização. Existem vários trabalhos que estão sendo dedicados ao desenvolvimento novos tipos de liga metálica que podem ser alternativamente utilizadas visando a minimização ou, como neste trabalho, eliminar o teor (%) do Co para a fabricação da ferramenta de corte [6,4].…”