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Composite materials specifically carbon fibre reinforced polymers (CFRP) are finding an increased usage in industries like aerospace, marine, automobile, and sport owing to high strength and stiffness properties compared to traditional metals and their alloys. The setup preparation cost and curing time of materials are very high in the autoclave process, different out-of-autoclave (OoA) processes are being developed. The heat transfer fluid (HTF) method for curing is quite possibly the most encouraging technique which is ideal for small-sized components, quick, compact, energy-efficient, and achieves a great reduction in cost and time. This research paper describes the design and development of a novel HTF curing setup for CFRP prepreg. The specimens have been manufactured using the HTF curing process according to ASTM standards. The mechanical properties like tensile and flexural strength have been measured for fabricated test coupons. The results obtained for mechanical properties in the HTF curing process have been compared with samples prepared with autoclave and microwave curing processes. It has been observed that mechanical properties obtained in the HTF curing process are 48% higher than other curing processes because of the presence of less void content and high bonding developed in fibre-matrix during the process.

Development and performance analysis of out-of-autoclave curing process for CFRP composites