混杂复合材料中热变形的监测
Monitoring Thermal Transformations in Hybrid Composites
摘要：
混杂复合材料，有机和无机材料的混合物通常在热处理后达到其最终性能，包括部分或完全分解和化学反应。三个例子来证明监测这些复杂的转换，通过各种分析技术的可能性。第一种是含有有机和无机添加剂的聚脲基预浸料系统，在固化后进行热处理后实现极高的热稳定性。下一个例子取自氧化铝基陶瓷注射成型系统。研究了基体聚合物、添加剂柠檬酸、超高分子量聚乙烯（UHMWPE）以及氧化铝/氧化铝配比对陶瓷注射成型料的加工性能和孔隙率的影响。最后一个实施例提出了一种通过在金属注射成型原料中使用金属有机化合物作为添加剂来制备ODS（氧化物分散钢）体的新方法。应用的表征方法包括热重分析（TGA）、差热分析（DTA）、X射线衍射（WAXS）、X射线光电子能谱学（XPS）、结合能量色散X射线分析（EDX）的扫描电子显微镜（SEM）、振动光谱（Raman和FTIR）和密度测量。
英文摘要：
Hybrid composites, mixtures of organic and inorganic materials frequently achieve their final properties after thermal treatment involving partial or complete decomposition and chemical reactions. Three examples are presented to demonstrate the possibilities of monitoring these complex transformations by various analytical techniques. The first one is a polyurea based prepreg system containing both organic and inorganic additives, achieving extreme heat stability after curing followed by a heat treatment. Next example is taken from alumina based ceramic injection molding systems. The effects of matrix polymer and various additives, such as citric acid, UHMWPE (ultrahigh molecular weight polyethylene) and the effect of alumina trihydrate/alumina ratio in the ceramic injection molding feedstock was studied on the processability and porosity. The last example presents a new approach to prepare ODS (oxide dispersed steel) bodies by using metalorganic compounds as additives in metal injection molding feedstocks. Applied characterization methods included thermogravimetry (TGA), differential thermal analysis (DTA), X-ray diffraction (WAXS), X-ray photoelectron spectroscopy (XPS), scanning electron microcopy (SEM) coupled with energy dispersive X-ray analysis (EDX), vibrational spectroscopy (Raman and FTIR) and density measurements.
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