CAJ | 학술논문

采用机械球磨法制备了一系列高活性铝基燃料,并通过XRD、SEM和水解性能测试考察了盐和氢化物掺杂对铝合金性能的影响.结果表明,氢化物(盐)的加入明显改善了铝合金水解性能.以Al-10%Bi-10%MgH_2合金水解为例,1 g该合金水解产生783 ml/g氢气(不包含0.1 g的MgH_2水解产生的167 ml氢气),氢气生成速率为78.3 ml/(min·g),远远超过Al-16%Bi合金氢气产量(670 ml/g)和氢气生成速率(23 ml/(min·g)).氢化物(盐)的作用在于:(1)在球磨过程中,氢化物(盐)有利于减小铝基燃料的粒径;(2)氢化物(盐)溶解产生的热量有利于改善铝基燃料的水解动力学;(3)氢化物(盐)溶解产生大量的导电性离子,促进了铝基燃料在水中迅速形成微型腐蚀电池,并加快微型腐蚀电池工作.
채용궤계구마법제비료일계렬고활성려기연료,병통과XRD、SEM화수해성능측시고찰료염화경화물참잡대려합금성능적영향.결과표명,경화물(염)적가입명현개선료려합금수해성능.이Al-10%Bi-10%MgH_2합금수해위례,1 g해합금수해산생783 ml/g경기(불포함0.1 g적MgH_2수해산생적167 ml경기),경기생성속솔위78.3 ml/(min·g),원원초과Al-16%Bi합금경기산량(670 ml/g)화경기생성속솔(23 ml/(min·g)).경화물(염)적작용재우:(1)재구마과정중,경화물(염)유리우감소려기연료적립경;(2)경화물(염)용해산생적열량유리우개선려기연료적수해동역학;(3)경화물(염)용해산생대량적도전성리자,촉진료려기연료재수중신속형성미형부식전지,병가쾌미형부식전지공작.
The Al-hased composites were prepared via milling method, and the effects of hydride(salts)on their performances were studied through the measures of XRD, SEM and hydrolysis. The results show that the additive hydrides (salts) have improved the hydrolysis performances of the Al-based composites. For example, Al-10％ Bi-10％ MgH_2 has much higher hydrolysis properties (783 ml/g hydrogen(not including 167 ml hydrogen from the hydrolysis of 0. 1 g MgH_2) and 78.3 ml/(min· g)) than that of Al-l6％ Bi alloy (670 ml/g and 23 ml/(min·g)). The improved hydrolysis performance comes from the following factors: (1)The ad-ditive hydrides (salts)favors decreasing the particle sizes of the Al-based composites in the milling process;(2)The dissolution en-thalpy improves the hydrolysis kinetics of Al-hased composites;(3)A quantity of ions produced from hydrides(salts) solution quick-ens the work of the micro-galvanic cell between Al and other metals.