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Evaluation of thermal debinding of injection-molded boron carbide in an ambient atmosphere

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Abstract

Characterization of thermal debinding of boron carbide green samples in an ambient atmosphere with the temperature range of 350 to 500 °C was investigated. Binders are easier to remove in the ambient atmosphere because of the continuous oxygen supply. XRD results show that the diffraction peak of B2O3 appears in debound samples above 350 °C. The diameter and mass of the samples display no significant changes when the debinding temperature is below 400 °C. Moreover, glassy phases are not observed through the analysis on fracture surfaces by scanning electron microscope and debound samples have enough strength for the handling. The linear shrinkage and mass growth of debound samples improve markedly with increasing debinding temperature. Glassy phases are observed when debinding temperature is above 500 °C. Furthermore, the linear shrinkages of these sintered samples debound in the ambient atmosphere below 400 °C are about 18 % which are consistent with the sintered samples debound beforehand in Ar. Therefore, thermal debinding in an ambient atmosphere under suitable temperature (400 °C) is feasible for powder injection-molded B4C material.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, People’s Republic of China

    Changrui Wang, Zhen Lu & Kaifeng Zhang

  2. Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Ministry of Education, Harbin Institute of Technology, Harbin, People’s Republic of China

    Zhen Lu & Kaifeng Zhang

Authors
  1. Changrui Wang
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  2. Zhen Lu
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  3. Kaifeng Zhang
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Correspondence to Zhen Lu.

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Wang, C., Lu, Z. & Zhang, K. Evaluation of thermal debinding of injection-molded boron carbide in an ambient atmosphere. Int J Adv Manuf Technol 64, 1751–1757 (2013). https://doi.org/10.1007/s00170-012-4138-8

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  • DOI: https://doi.org/10.1007/s00170-012-4138-8

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