Kinetics and mechanism of titanium hydride powder and aluminum melt reaction |
| |
| Authors: | Ali Rasooli Mehdi Divandari Hamid Reza Shahverdi Mohammad Ali Boutorabi |
| |
| Affiliation: | 1.School of Metallurgy and Materials Engineering, Member of Center of Excellence for Advanced Material and Processing (CEAMP),Iran University of Science and Technology,Tehran,Iran;2.Department of Materials, Faculty of Engineering,Tarbiat Modaress University,Tehran,Iran |
| |
| Abstract: | Based on the measurement of the released hydrogen gas pressure (¶H2 \P_{H_2 }), the reaction kinetics between TiH2 powder and pure aluminum melt was studied at various temperatures. After cooling the samples, the interface of TiH2 powder
and aluminum melt was studied. The results show that the 2 H ¶H2 \P_{H_2 }-time curves have three regions; in the first and second regions, the rate of reaction conforms zero and one order, respectively;
in the third region, the hydrogen gas pressure remains constant and the rate of reaction reaches zero. The main factors that
control the rate of reaction in the first and second regions are the penetration of hydrogen atoms in the titanium lattice
and the chemical reaction between molten aluminum and titanium, respectively. According to the main factors that control the
rate of reaction, three temperature ranges are considered for the reaction mechanism: (a) 700–750°C, (b) 750–800°C, and (c)
800–1000°C. In the first temperature range, the reaction is mostly under the control of chemical reaction; at the temperature
range of 750 to 800°C, the reaction is controlled by the diffusion and chemical reaction; at the third temperature range (800–1000°C),
the dominant controlling mechanism is diffusion. |
| |
| Keywords: | |
| 本文献已被 万方数据 SpringerLink 等数据库收录！ |
| 点击此处可从《矿物冶金与材料学报》浏览原始摘要信息 |
|
点击此处可从《矿物冶金与材料学报》下载全文 |
|
