Morphological optimization of process parameters of randomly oriented carbon/carbon composite

Thakur Sudesh Kumar Raunija; Sushant Krunal Manwatkar; Sharad Chandra Sharma; Anil Verma

Morphological optimization of process parameters of randomly oriented carbon/carbon composite

Carbon Letters
Abbr : Carbon Lett.
2014, 15(1), pp.25-31
Publisher : Korean Carbon Society
Research Area : Natural Science > Natural Science General > Other Natural Sciences General

Thakur Sudesh Kumar Raunija ¹, Sushant Krunal Manwatkar ¹, Sharad Chandra Sharma ¹, Anil Verma ¹

¹Vikram Sarabhai Space Centre

Accredited

ABSTRACT

A microstructure analysis is carried out to optimize the process parameters of a randomlyoriented discrete length hybrid carbon fiber reinforced carbon matrix composite. The compositeis fabricated by moulding of a slurry into a preform, followed by hot-pressing andcarbonization. Heating rates of 0.1, 0.2, 0.3, 0.5, 1, and 3.3°C/min and pressures of 5, 10, 15,and 20 MPa are applied during hot-pressing. Matrix precursor to reinforcement weight ratiosof 70:30, 50:50, and 30:70 are also considered. A microstructure analysis of the carbon/carbon compacts is performed for each variant. Higher heating rates give bloated compactswhereas low heating rates give bloating-free, fine microstructure compacts. The compactsfabricated at higher pressure have displayed side oozing of molten pitch and discrete lengthcarbon fibers. The microstructure of the compacts fabricated at low pressure shows a lack ofdensification. The compacts with low matrix precursor to reinforcement weight ratios haveinsufficient bonding agent to bind the reinforcement whereas the higher matrix precursor toreinforcement weight ratio results in a plaster-like structure. Based on the microstructureanalysis, a heating rate of 0.2°C/min, pressure of 15 MPa, and a matrix precursor to reinforcementratio of 50:50 are found to be optimum w.r.t attaining bloating-free densificationand processing time.

KEYWORDS

carbon/carbon composite, processing parameters, hot-pressing, carbonization and morphology

Citation status

This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2023-01-03)

Total Citation Counts(KCI+WOS) (13) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

* References for papers published after 2023 are currently being built.

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Carbon Letters 2023 KCI Impact Factor : 1.35 KCI-WoS Impact Factor : 6.04