ABSTRACT

For reducing the forming cost of the PAN-based carbon fibre preforms, a water glass binder was used as a substitute for conventional silica binder. The preforms were infiltrated with an aluminium alloy melt by squeeze casting to fabricate the fibre-reinforced composites. The microstructure and properties of the composites were compared to the composites using the silica binder. In the composites, the water glass binder mainly remained in the vicinity of the fibre–aluminium interface and partially distributed in the matrix. The reaction near the interface between the alloy melt and binder was not recognised. The thermal expansion coefficient, thermal conductivity and the compressive strength of the composites using the water glass binder were approximately equivalent to those of the composite using the silica binder. Based on these results, the water glass can be used as an alternative binder to the silica sol.

摘要

为了降低 PAN 基碳纤维预制棒的成型成本，水玻璃粘合剂被用作传统二氧化硅粘合剂的替代品。通过挤压铸造将铝合金熔体渗透到预制件中，以制造纤维增强复合材料。将复合材料的微观结构和性能与使用二氧化硅粘合剂的复合材料进行比较。在复合材料中，水玻璃粘合剂主要保留在纤维-铝界面附近，部分分布在基体中。未发现合金熔体和粘合剂之间界面附近的反应。使用水玻璃粘合剂的复合材料的热膨胀系数、导热系数和抗压强度与使用二氧化硅粘合剂的复合材料大致相当。基于这些结果，