Journal of Inorganic Materials ›› 2015, Vol. 30 ›› Issue (7): 769-773.doi: 10.15541/jim20140658

• Orginal Article • Previous Articles     Next Articles

Effect of B2O3 Doping and Phosphate Impregnation on Oxidation Resistance and Mechanical Properties of Mesocarbon Microbead Composites

Zhuo-Yan LEI1,2(), Zhi WANG1,2(), Heng-Bing FAN2, Wen-Bin MA2, Jian CHEN2, Xu WANG2   

  1. 1. Liaoning General Aviation key laboratory, Shenyang Aerospace University, Shenyang 110136, China
    2. School of Safety Engineering, Shenyang Aerospace University, Shenyang 110136, China
  • Received:2014-12-18 Revised:2015-01-31 Online:2015-07-20 Published:2015-06-25
  • About author:LEI Zhuo-Yan. E-mail: leizhuoyan@126.com
  • Supported by:
    Shenyang Science and Technology Program (F12-277-1-33);Program for Liaoning Excellent Talents in University (LJQ2012014)

Abstract:

Mesocarbon microbead/carbon nanotubes (MCMB/CNTs) composites were modified by adding B2O3 powders and phosphate impregnation and the MCMB/CNTs were prepared using in-situ thermal polymerization. The morphology, flexural strength and oxidation resistance behavior were studied using scanning electron microscope (SEM), three-point bending tests, thermo gravimetric analysis (TG) and isothermal oxidation method. The results show that the oxidation resistance and flexural strength of the composites are enhanced with proper amount of B2O3. When the ratio of B2O3 is beyond 2%, the flexural strength of the sample begins to decrease. The sample with 2% B2O3 impegnated with phosphate reachs the highest flexural strength of 66 MPa, and the initial mass loss temperature of the samples is 520℃. After isothermal oxidation at 500℃ for 60 min, the mass loss and the flexural strength of the sample are 5% and 50.3 MPa, respectively.

Key words: mesocarbon microbead, flexural strength, mass loss, oxidation resistance

CLC Number: 

  • TQ174