The oxidation behavior of the Ti-47.5Al-2.5V-1.0Cr-0.2Zr alloy at 900 °C was investigated different times (5, 20, 60 and 100 h). results show that total weight gain after h is 9.1 g·m−2, rate decreases with time. oxides on surface are mainly TiO2 Al2O3. At beginning (5 h), oxide film relatively complete, thin, interface between layer matrix virtually flat. end (100 thickness expanded, cracking ...

Abstract To obtain rockburst characteristics at rock engineering, the event, in situ stress characteristics, and proneness are studied a deep gold mine. The severity of increases with cover depth main locations spalling events include roof sidewall. measurement results show this area that is controlled by horizontal constructional pressure, self-weight also has an important influence. mechanism...

We analyze the effect of growth on non-(100) surfaces resulting from incomplete planarization spalled GaAs wafers defect structure solar cell layers grown by hydride vapor phase epitaxy (HVPE). Controlled spalling (100)-oriented has potential to reduce substrate costs for III-V epitaxy; however, it creates regularly faceted that may complicate high-quality optoelectronic devices. leverage aniso...

Concrete has traditionally been considered as a material with favourable fire resistance. The development of modern concretes low permeability has, however, resulted in the increased occurrence spalling when exposed to fire. Recent damage South Africa during riots July 2021 such damage. This paper presents an overview explosive concrete fire, recent local observations, and developments field. I...