Autor: FELIPE DE JESUS GARCIA VAZQUEZ

Effects of Silicon Nanoparticles on the Transient Liquid Phase Bonding of 304 Stainless Steel

HECTOR MANUEL HERNANDEZ GARCIA RITA MUÑOZ ARROYO JORGE LEOBARDO ACEVEDO DAVILA FELIPE DE JESUS GARCIA VAZQUEZ FELIPE ARTURO REYES VALDES (2014)

Transient liquid phase (TLP) bonding of 304 stainless steel with nickel based filler metal, BNi-9, was performed to

study the influence of silicon nanoparticles (NPs) on the mechanical and structural properties of the bonding area.

It was found that silicon NPs act as a melting point depressant in the brazing process; the formation of silicon TLP

induces the dissolution of elements of the metal filler and promotes a uniform distribution in the bonding area.

Silicon NPs induce the development of smaller eutectic structures in the melting zone; it has been related to

microhardness measurements, which are lower when the silicon NPs are used in the brazing process.

Artículo

Nanopartículas INGENIERÍA Y TECNOLOGÍA CIENCIAS TECNOLÓGICAS TECNOLOGÍA METALÚRGICA

Effect of Nd:YAG Laser Welding Process Parameters on Al4C3 Formation in Advanced Aluminum Graphite Composites

EDGAR DANIEL AGUILAR CORTES FELIPE DE JESUS GARCIA VAZQUEZ JORGE LEOBARDO ACEVEDO DAVILA FRANCISCO CEPEDA RODRIGUEZ MARTIN IGNACIO PECH CANUL (2012)

Aluminum/Graphite composites (Al/C composites) have the advantages of Al (light weight, easy

machinability and good heat conduction) in combination with the advantages of C whiskers (High

Young’s Modulus, small to negative CTE, high tensile strength and high thermal conductivity).

However, Metallographic analysis, EDX and microhardness profile revealed that fibers react with

molten aluminum to form the detrimental Al4C3 phase in the HAZ and fusion zone. In order to gain

information about temperature transformation and formation conditions, scanning electron microscopy,

and termochemistry analysis were used. For experiments, were used power density (I), pulse width (t),

frequency (F), travel speed (S) and filler material (M) as independent variables. Thereby, was found

that the main process variables that influence the formation of Al4C3 are pulse duration and welding

speed, and that the effect of these variables cannot be explained only by using a thermodynamic model,

requiring a subsequent kinetic analysis.

Capítulo de libro

Laser welding; Aluminum/Graphite composites; Al4C3 INGENIERÍA Y TECNOLOGÍA CIENCIAS TECNOLÓGICAS TECNOLOGÍA INDUSTRIAL