Mechanical properties and thermal stability of ZnAl2O4-coated aluminum borate whiskers reinforced 2024Al composite

Abstract

ZnAl 2 O 4 -coated aluminum borate whiskers reinforced 2024Al composite was fabricated by squeeze casting. Interfacial microstructures and tensile properties of the composite were investigated. The results show that ZnAl 2 O 4 coating of the whiskers can improve the wettability of the whiskers by molten aluminum during squeeze casting, resulting in the increase of tensile properties of the composite. During thermal exposure, ZnAl 2 O 4 at the interface can effectively hinder harmful interfacial reactions, resulting in the improvement of thermal stability of the composite at high temperatures. Fracture mechanisms of the composite in as-cast and after thermal exposure were also investigated.

Optical properties of Cr doped ZnAl2O4 nanoparticles with Spinel structure synthesized by hydrothermal method

“…Among the spinel structure metal-oxide, ZnAl 2 O 4 belonging to Fd3m space group with cubic structure and wide band gap energy (3.8 eV), ZnAl 2 O 4 have attracted much attention due to their high temperature stability, high mechanical strength, low surface acidity, good cationic dispersion, excellent optical and dielectric properties [14][15][16]. The crystal structure and band structure of metal oxide semiconductors can be adjusted by modification of precious metals, composite with metal oxide semiconductor or carbon materials, metal ion doping and metal ion doping and synthesis of nano semiconductor materials [17][18][19][20].…”