Preparation and process optimization of randomly oriented C/C composites by a novel method

Thakur Sudesh Kumar Raunija; Rajeev K. Gautam; Sharad Chandra Sharma; Anil Verma

doi:10.1016/S1872-5805(18)60350-6

Volume 33 Issue 5

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Thakur Sudesh Kumar Raunija, Rajeev K. Gautam, Sharad Chandra Sharma, Anil Verma. Preparation and process optimization of randomly oriented C/C composites by a novel method. New Carbon Mater., 2018, 33(5): 424-433. doi: 10.1016/S1872-5805(18)60350-6

Citation:

Thakur Sudesh Kumar Raunija, Rajeev K. Gautam, Sharad Chandra Sharma, Anil Verma. Preparation and process optimization of randomly oriented C/C composites by a novel method. New Carbon Mater., 2018, 33(5): 424-433. doi: 10.1016/S1872-5805(18)60350-6

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Preparation and process optimization of randomly oriented C/C composites by a novel method

doi: 10.1016/S1872-5805(18)60350-6

1.
Carbon and Ceramics Laboratory, Materials and Mechanical Entity, Vikram Sarabhai Space Centre, Indian Space Research Organisation, Thiruvananthapuram 695022, Kerala, India;
2.
Sustainable Environergy Research Lab(SERL), Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz-Khas, New Delhi 110016, India;
3.
Materials and Metallurgy Group, Materials and Mechanical Entity, Vikram Sarabhai Space Centre, Indian Space Research Organisation, Thiruvananthapuram 695022, Kerala, India

Received Date: 2018-03-01
Accepted Date: 2018-11-01
Rev Recd Date: 2018-08-02
Publish Date: 2018-10-28

Abstract

Abstract

Conventional ways of fabricating C/C composites are unable to achieve wetting in the core of the carbon fiber tow by molten pitch because a single tow has thousands of fibers. Pitch stabilization after infiltration into the carbon fiber preform results in local oozing of the pitch and a non-uniform microstructure due to non-uniform pitch stabilization in the preform. The objective of this research was to devise a method by which complete wetting of fibers in the tow with mesophase pitch is attained by mixing stabilized pitch and chopped and scattered carbon fibers, followed by hot-pressing and carbonization. The influence of process parameters on the carbon yield of the stabilized mesophase pitch is evaluated. The carbon yield divided by processing time and the carbon yield multiplied by the ratio of the apparent density to real density of the C/C composites are used to optimize process parameters. Results show that complete wetting of fibers with mesophase pitch is attained by this method. The carbon yield of the stabilized mesophase pitch decreases with heating rate and the mass ratio of stabilized pitch to carbon fibers, and increases with hot-pressing pressure. At high pressures and high mass ratios, local oozing of the stabilized pitch occurs. The optimum C/C composite was prepared under a hot-pressing pressure of 15 MPa, a heating rate of 0.2℃/min and a mass ratio of stabilized pitch to carbon fibers of 1:1.
- Petroleum pitch,
- Mesophase pitch,
- Short carbon fibers,
- Hot-pressing,
- Yield

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References(20)

References

Xiong X, Huang B y, Li J h, et al. Friction behaviors of carbon/carbon composites with different pyrolytic carbon textures[J]. Carbon, 2006, 44(3):463-467.

Windhorst T, Blount G. Carbon-carbon composites:a summary of recent developments and applications[J]. Materials & Design, 1997, 18(1):11-15.

Fitzer E. The future of carbon-carbon composites[J]. Carbon, 1987, 25(2):163-190.

Raunija TSK, Manwatkar SK, Sharma SC, et al. Morphological optimization of process parameters of randomly oriented carbon/carbon composite[J]. Carbon Lett, 2014,15(1):25-31.

Raunija TSK, Babu S, Wesley C. A process of producing carbon/carbon composite[J]. IN Patent App, 1713/CHE/2,0122012.

Raunija TSK, Babu S. Randomly Oriented Carbon/Carbon Composite[C]. Carbon Materials, 2012(CCM12):Carbon Materials for Energy Harvesting, Environment, Nanoscience and Technology:AIP Publishing, 2012:168-171.

Savage G. Carbon-Carbon Composites[M]. Springer, 1993.

White J L, Sheaffer PM. Pitch-based processing of carbon-carbon composites[J]. Carbon N Y, 1989, 27(5):697-707.

Fanjul F, Granda M, Santamaría R, et al. Pyrolysis behaviour of stabilized self-sintering mesophase[J]. Carbon, 2003, 41(3):413-422.

Fathollahi B, Chau PC, White JL. Injection and stabilization of mesophase pitch in the fabrication of carbon-carbon composites:Part Ⅱ. Stabilization process[J]. Carbon, 2005,43(1):135-141.

Fathollahi B, Jones B, Chau PC, et al. Injection and stabilization of mesophase pitch in the fabrication of carbon-carbon composites. Part Ⅲ:Mesophase stabilization at low temperatures and elevated oxidation pressures[J]. Carbon, 2005, 43(1):143-151.

Fathollahi B, Chau PC, White JL. Injection and stabilization of mesophase pitch in the fabrication of carbon-carbon composites. Part I. Injection process[J]. Carbon, 2005, 43(1):125-133.

Manocha L M, Patel M, Manocha SM, et al. Carbon/carbon composites with heat-treated pitches:I. Effect of treatment in air on the physical characteristics of coal tar pitches and the carbon matrix derived therefrom[J]. Carbon, 2001, 39(5):663-671.

Petrova B, Budinova T, Petrov N, et al. Effect of different oxidation treatments on the chemical structure and properties of commercial coal tar pitch[J]. Carbon, 2005, 43(2):261-267.

Gerard Lavin J. Chemical reactions in the stabilization of mesophase pitch-based carbon fiber[J]. Carbon, 1992, 30(3):351-357.

Gray G, Payne RS, Savage GM, et al. Production and densification of carbon-carbon composites using HIP techniques[J]. Metal Powder Report, 1990, 45(4):290-294.

Huang X d, Pan Z j, Huang J w, et al. Performance of unidirectional carbon fibre cloth/carbon composite laminates fabricated by hot-pressing[J]. Carbon, 2012, 50(8):3119.

Li H, Li H, Lu J, et al. Effects of air oxidation on mesophase pitch-based carbon/carbon composites[J]. Carbon, 2011, 49(4):1416-1422.

Ehrburger P, Dentzer J, Dziedzinl P. Pyrolysis of impregnated carbon adsorbents after exposure to cyanide gases[J]. Journal of Analytical and Applied Pyrolysis, 1993, 24(3):333-344.

Vix-Guterl C, Shah S, Dentzer J, et al. Carbon/carbon composites with heat-treated pitches:Ⅱ. Development of porosity in composites[J]. Carbon, 2001, 39(5):673-683.[

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