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Título del libro: Materials Science And Technology Conference And Exhibition 2017, Ms And T 2017
Título del capítulo: Mechanical and thermal properties of infiltrated 3D-Si3N4 coated SiO2/Al-Mg-Si and Si3N4/Al-Mg-Si alloys by pressureless infiltration

Autores UNAM:
NILOOFAR SOLTANI; AMIN BAHRAMI;
Autores externos:

Idioma:
Inglés
Año de publicación:
2017
Palabras clave:

Aluminum alloys; Aluminum coatings; Diffusion; Electric conductivity; Hardness; Preforming; Silica; Silicon nitride; Silicon oxides; Thermal diffusivity; Infiltration time; Mechanical and thermal properties; Pressureless infiltration; Processing parameters; Rice husk ash; Taguchi experimental design; Silicon alloys


Resumen:

The effect of processing parameters on the pressureless infiltration of Si3N4 and coated SiO2 preforms by aluminum alloys has been investigated. The effect of atmosphere, infiltration time, temperature, porosity of perform, and Si3N4 coating on the SiO2 particles, on the pressureless infiltration of rice husk ash preforms with aluminum, was investigated and quantified via a Taguchi experimental design and ANOVA. The contributions of each of the parameters and of their interactions on module of elasticity, hardness and thermal diffusivity of the composites were determined. The maximum modulus of elasticity and hardness obtained were 265 GPa and 842 HV, respectively. The thermal diffusivity of four fabricated samples (two samples with the highest and two samples with lowest electrical resistivity) was measured. The results show that the composite with the highest value of electrical resistivity has the highest value of thermal diffusivity (20.4 mm2/s). © Copyright 2017 MS&T17®.


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