Joining composite materials with reactive nickel-aluminium particles as an innovative additive in epoxy-based adhesives
Joining composite materials with reactive nickel-aluminium particles as an innovative additive in epoxy-based adhesives
复制标题
将复合材料与活性镍铝颗粒连接，作为环氧基粘合剂的创新添加剂
DOI：
10.1088/1757-899x/480/1/012011
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Friedrich
中科院分区：
文献类型：
--
作者：
Grohmann;Friedrich
由具有不同热物理性质的材料组成的接头通常有利于轻质部件。然而，这种接头的制造已经成为连接技术的关键问题。克服相关挑战的一种创新方法是使用反应性颗粒。每个反应性颗粒包含至少两种反应物，其能够在通过外部能量输入点燃之后经历放热的自持反应。取决于反应物的化学计量比和加热速率，对于镍和铝系统，在毫秒内达到高达1500 K的温度。在汽车工业中，结合是电动汽车应用的最新技术。然而，粘合剂的缓慢交联增加了循环时间并导致初始低处理强度，这需要额外的机械固定。本文介绍了在环氧基胶粘剂中使用活性粒子的好处。将不同量的反应性颗粒整合到两部分环氧粘合剂中，并用微波能量活化。由于微波促进了环氧树脂的交联和颗粒的反应，固化时间显著缩短。加入铝和聚丙烯试样证明了所提出的方法的潜力。
Joints comprised of materials with different thermo-physical properties are often advantageous for lightweight components. However, the fabrication of such joints has become a key issue for joining technologies. An innovative approach to overcome the associated challenges is the use of reactive particles. Each reactive particle contains at least two reactants, which are able to undergo an exothermic, self-sustaining reaction after the ignition by an external energy input. Depending on the stoichiometric ratio of the reactants and the heating rate, temperatures up to 1500 K are reached within milliseconds for the nickel and aluminium system. In the automotive industry, bonding is state of the art for applications in electromobility. Yet, slow cross-linking of the adhesive increases cycle times and results in an initial low handling strength, which requires additional mechanical fixings. The benefits of using reactive particles in epoxy-based adhesives are shown in this paper. Varying quantities of reactive particles were integrated into two part epoxy adhesives and activated with microwave energy. Due to the promotion of the cross-linking of the epoxy resin and the reaction of the particles by the microwaves, curing times were significantly shortened. Joining aluminium and polypropylene specimens demonstrated the potential of the presented approach.
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