Metal fuels with high energy density have been receiving attention recently as alternatives to fossil fuels in propulsion systems, power generation applications, and energy storage technology. However, to adopt metal fuels for such purposes, maintaining the designed performance level and greater reliability are required. Thus, aging analysis as well as thermal analysis of metal fuels must be conducted thoroughly prior to such practical applications. In order to identify an aging mechanism, the present paper investigates the variation in both thermodynamic characteristics and reaction kinetics of titanium hydride potassium perchlorate (THPP) under aging. Some chemical and physical defects of aged samples were also found by x-ray photoelectron spectrometer (XPS) and field emission scanning electron microscope (FE-SEM). The influence of aging on combustion reactions of THPP was elucidated by carrying out the non-isothermal differential scanning calorimetry (DSC) and thermogravimetry (TGA). Based on the changes in thermodynamic characteristics and reaction kinetics, the altered reaction mechanism due to aging was investigated. Certain samples aged under humid environments had different activation energy pathways for reaction progress due to an increased amount of TiO₂, which can give rise to severe changes in lifetime and stability after all.

具有高能量密度的金属燃料作为推进系统，发电应用和能量存储技术中化石燃料的替代品最近已受到关注。然而，为了将金属燃料用于这种目的，需要保持设计的性能水平和更高的可靠性。因此，在进行这种实际应用之前，必须对金属燃料进行老化分析以及热分析。为了确定老化机理，本文研究了氢化钛高氯酸钾（THPP）在老化条件下热力学特性和反应动力学的变化。X射线光电子能谱仪（XPS）和场发射扫描电子显微镜（FE-SEM）还发现了老化样品的一些化学和物理缺陷。通过进行非等温差示扫描量热法（DSC）和热重分析（TGA），阐明了老化对THPP燃烧反应的影响。基于热力学特性和反应动力学的变化，研究了由于老化而改变的反应机理。由于TiO的含量增加，某些在潮湿环境下老化的样品具有不同的活化能途径来进行反应₂毕竟会导致寿命和稳定性的严重变化。