Ni/Al复合材料的起始反应温度研究

Research on the Initial Reaction Temperatures of Ni/Al Composites

Ni/Al复合材料是制备Ni Al金属间化合物的重要原料,同时也是一种典型的结构能源双功能材料.本文主要采用管式电阻炉测试了Ni/Al复合材料的起始反应温度,研究了样品状态、粉末粒径、Al/Ni摩尔比、测试气氛、第三相等对材料起始反应温度的影响.结果表明:压制态的Ni/Al复合材料的起始反应温度比粉末态的要低;Ni/Al复合材料的起始反应温度随粉末粒径的降低而降低,随Al/Ni摩尔比的增大先升高后降低;空气气氛下的起始反应温度高于惰性气氛下的;添加W可提高材料的起始反应温度,而添加Mg则降低材料的起始反应温度.

Ni/M composite is a typical dual functional structural energetic material,which is often used to prepare intermetallic compound.The initial reaction temperatures of Ni/A1 com- posites were measured using tubular resistance furnace in this paper.And the effects of the sample status, particle size, molar ratio of M to Ni, atmosphere and the third phase on the in- itial reaction temperature were studied.Results show that the initial reaction temperature of Ni/Al compact is lower than that of the Ni/M mixture powders.The initial reaction tempera- ture of Ni/Al composite decreases with the decrease of the particle size, and increases with the increase of molar ratio Al to Ni and then decreases after the first increased.The initial re- action temperature measured under inert atmosphere is higher than that measrued under air atmosphere.Addition of W can increase the initial reaction temperature of the composite ma- terial,but the addition of Mg results in reducing of the initail reaction temperature.