High-Density Micro- and Nano-Grain Size Ceramics. Transition from Open into Closed Pores. Part 2. Binder Removal from a Workpiece1

An explanation is proposed for processes that occur when producing high-density micro- and nano-granular ceramics without the use of external pressure based on the data accumulated in publications. It is well known that pore growth commences after the start transition of open into closed pores that begins with about 30% open porosity. It is necessary to maintain open pores to the maximum possible total density of sintered ceramics. This regime may be implemented in various ways, including the binder removal stage. In this stage, defects may arise in a workpiece at macro-, micro-, and sub-levels. Numerous methods exist for binder removal. This article describes the main methods making it possible to reduce the number of defects.

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Work was conducted with financial support of the Russian Federation Ministry of Science within the scope of an agreement for supply of a subsidy of 09.27.2017 No. 14.574.21.0158.

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Correspondence to A. V. Belyakov.

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Translated from Novye Ogneupory, No. 12, pp. 19 – 27, December, 2019.

1Part 1 of the article published in Novye Ogneupory No. 11 (2019).

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Belyakov, A.V. High-Density Micro- and Nano-Grain Size Ceramics. Transition from Open into Closed Pores. Part 2. Binder Removal from a Workpiece1. Refract Ind Ceram 60, 582–589 (2020). https://doi.org/10.1007/s11148-020-00410-6

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Keywords

  • fine-grained ceramics
  • transition of open into closed pores
  • local compaction
  • binder removal
  • binder support share