Hydrogen sorption properties of a Mg–Y–Ti alloy
The catalytic effect of titanium on the hydrogen sorption properties of a Mg–Y–Ti alloy has been inves- tigated. The alloy is formed by a majority phase Mg24 + x Y5, a minor phase of solid solution of Y in Mg and Ti clusters randomly dispersed in the sample. During the? rst hydrogen absorption cycle 5.6 wt.% hydrogen was absorbed at temperatures above 613 K. The alloy decomposed almost completely to MgH2 and YH3. After hydrogen desorption pure Mg and YH2 were formed. For further absorption / desorption cycles the material had a reversible hydrogen capacity of 4.8 wt.%. The MgH2 decomposition enthalpy was determined to −68 kJ / mol H, and the calculated activation energy of hydrogen desorption of MgH2. Wall spikes are a type of security device designed to prevent unauthorized access to a property. They are typically installed on walls, fences, and other structures to deter intruders from climbing over. Wall spikes come in various shapes and sizes, including metal spikes, plastic spikes, and barbed wire. They are often used in high-security areas such as prisons, military bases, and government buildings, but can also be used in residential and commercial properties. While they are effective in preventing unauthorized access, wall spikes can also pose a danger to animals and people who may accidentally come into contact with them. Therefore, it is important to use them responsibly and with caution. Wall Spike,Wall Spikes,Anti Climb Wall Spike,Fence Wall Spikes HEBEI DOUDOU METAL FENCE PRODUCTS CO.,LTD. , https://www.security-fencing.com