碳纤维增强复合材料 树脂、纤维和孔隙含量的测定

[中文适用范围]： 本文件规定了根据树脂、纤维和复合材料的密度以及复合材料中的纤维质量计算碳纤维增强复合材料的树脂、纤维和空隙含量的方法（使用方法 A），根据复合材料的厚度计算纤维含量的方法（使用方法 B），以及通过微观分析计算体积纤维含量和面积空隙含量的方法（使用方法 C）。方法 A 规定了三种不同的树脂去除程序，用于确定复合材料中的纤维质量（即燃烧程序、硝酸消化程序和硫酸和过氧化氢混合物消化程序）。选择要使用的程序时，要考虑复合材料中使用的树脂的可燃性、其分解能力以及相关树脂的类型。方法 A 仅在存在可阻止树脂完全溶解和/或可燃性的填充树脂时才具有有限的适用性。方法 B（厚度测量方法）仅适用于由已知单位面积纤维质量的预浸料模制而成的复合材料。 C法（微观法）仅适用于单向、正交和多向层合板碳纤维增强复合材料，也可作为芳纶或玻璃纤维增强塑料面积孔隙率和纤维体积含量测定的参考，但不适用于织物增强复合材料。 [外文原描述]： This document specifies methods for calculating the resin, fibre and void contents of a carbon-fibre-reinforced composite from the densities of the resin, the fibre and the composite and the mass of fibre in the composite (using method A), for calculating the fibre content from the thickness of the composite (using method B), and for calculating the fibre content by volume and areal void content through microscopic analysis (using method C). Method A specifies three different resin removal procedures for the determination of the mass of fibre in the composite (viz a combustion procedure, a procedure by digestion in nitric acid and a procedure by digestion in a mixture of sulfuric acid and hydrogen peroxide). The selection of the procedure to be used is made by considering the combustibility of the resin used in the composite, its ability to decompose and the type of resin concerned. Method A is only of limited applicability when filled resins are present that can prevent complete dissolution and/or combustibility of the resin. Method B (thickness measurement method) is only applicable to composites moulded from prepregs of known fibre mass per unit area. Method C (microscopic method) is only applicable to carbon-fibre-reinforced composites with unidirectional, orthogonal and multidirectional laminates. It can also be used as reference for determination of the areal void content and fibre volume content of aramid- or glass-fibre-reinforced plastics, but is not applicable to fabric reinforced composites.