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Effect of annealing on properties of carbonaceous materials. Part III: macro and microstrengths

Journal Article


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Abstract


  • Carbonaceous materials including cokes, chars, and pyrolyzed coals were annealed at temperatures

    ranging from 973 K to 1773 K (700 C to 1500 C) in an inert atmosphere. Macro and

    microstrengths of original and annealed carbonaceous materials were characterized by the

    tensile strength and fracture toughness. Fracture toughness was determined for inert maceralderived

    component (IMDC) and reactive maceral-derived component (RMDC) using ultramicro

    indentation. Experimental data obtained by tensile tests were processed using the Weibull

    statistical method to find ‘‘inherent’’ strength. Tensile strength of chars and coals was significantly

    increased by annealing at temperatures ranging from 973 K to 1373 K (700 C to

    1100 C); further increase in annealing temperature to 1773 K (1500 C) increased their tensile

    strength only slightly. Tensile strength of cokes decreased with the increasing annealing temperature;

    the major effect was observed in the temperature range from 1573 K to

    1773 K (1300 C to 1500 C). Fracture toughness of chars and coals was enhanced significantly

    by heat treatment at temperatures ranging from 973 K to 1373 K (700 C to 1100 C) as a result

    of pyrolysis, while that of cokes increased slightly by heat treatment. Fracture toughness of

    IMDC was higher than RMDC.Macrostrength of carbonaceous materials was strongly affected

    by their porosity and microstrength. The effect of pore geometry on macrostrength was marginal.

    Decreasing the porosity was more effective compared with increasing the microstrength in

    improving the macrostrength of carbonaceous materials.

Authors


  •   Xing, Xing (external author)
  •   Zhang, Guangqing
  •   Dell'Amico, Mark (external author)
  •   Ciezki, George (external author)
  •   Meng, Qingbo (external author)
  •   Ostrovski, Oleg (external author)

Publication Date


  • 2013

Citation


  • Xing, X., Zhang, G., Dell'Amico, M., Ciezki, G., Meng, Q. & Ostrovski, O. (2013). Effect of annealing on properties of carbonaceous materials. Part III: macro and microstrengths. Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, 44 (4), 870-877.

Scopus Eid


  • 2-s2.0-84880291529

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2153&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1144

Number Of Pages


  • 7

Start Page


  • 870

End Page


  • 877

Volume


  • 44

Issue


  • 4

Abstract


  • Carbonaceous materials including cokes, chars, and pyrolyzed coals were annealed at temperatures

    ranging from 973 K to 1773 K (700 C to 1500 C) in an inert atmosphere. Macro and

    microstrengths of original and annealed carbonaceous materials were characterized by the

    tensile strength and fracture toughness. Fracture toughness was determined for inert maceralderived

    component (IMDC) and reactive maceral-derived component (RMDC) using ultramicro

    indentation. Experimental data obtained by tensile tests were processed using the Weibull

    statistical method to find ‘‘inherent’’ strength. Tensile strength of chars and coals was significantly

    increased by annealing at temperatures ranging from 973 K to 1373 K (700 C to

    1100 C); further increase in annealing temperature to 1773 K (1500 C) increased their tensile

    strength only slightly. Tensile strength of cokes decreased with the increasing annealing temperature;

    the major effect was observed in the temperature range from 1573 K to

    1773 K (1300 C to 1500 C). Fracture toughness of chars and coals was enhanced significantly

    by heat treatment at temperatures ranging from 973 K to 1373 K (700 C to 1100 C) as a result

    of pyrolysis, while that of cokes increased slightly by heat treatment. Fracture toughness of

    IMDC was higher than RMDC.Macrostrength of carbonaceous materials was strongly affected

    by their porosity and microstrength. The effect of pore geometry on macrostrength was marginal.

    Decreasing the porosity was more effective compared with increasing the microstrength in

    improving the macrostrength of carbonaceous materials.

Authors


  •   Xing, Xing (external author)
  •   Zhang, Guangqing
  •   Dell'Amico, Mark (external author)
  •   Ciezki, George (external author)
  •   Meng, Qingbo (external author)
  •   Ostrovski, Oleg (external author)

Publication Date


  • 2013

Citation


  • Xing, X., Zhang, G., Dell'Amico, M., Ciezki, G., Meng, Q. & Ostrovski, O. (2013). Effect of annealing on properties of carbonaceous materials. Part III: macro and microstrengths. Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, 44 (4), 870-877.

Scopus Eid


  • 2-s2.0-84880291529

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2153&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1144

Number Of Pages


  • 7

Start Page


  • 870

End Page


  • 877

Volume


  • 44

Issue


  • 4