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VACUUM ›› 2026, Vol. 63 ›› Issue (3): 23-27.doi: 10.13385/j.cnki.vacuum.2026.03.03

• Thin Film • Previous Articles     Next Articles

Exploration of Corrosion Characteristics and Interface Failure Mechanism of TiB2-BN Composite Ceramics

HOU Yu1,2, CAO Zhiqiang1, XIA Wei2   

  1. 1. Beijing NAURA Vacuum Technology Co., Ltd., Beijing 100015, China;
    2. NAURA Technology Group Co., Ltd., Beijing 100176, China
  • Received:2025-06-09 Online:2026-05-25 Published:2026-06-01

Abstract: The application of vacuum continuous evaporation plating technology in the composite current collector industry remains constrained primarily by the service life limitations of the core evaporation component (ceramic evaporation boats). This study systematically investigates the corrosion process of evaporation boats used for composite current collectors. Micro-zone compositional and structural evolutions during corrosion are characterized via the X-ray diffraction and scanning electron microscopy. Compositional analyses of distinct corroded regions on the evaporation boat surface reveal that the failure mechanism of TiB2-BN ceramic evaporation boats involves: (1) depletion of surface BN constituents, with aluminum nitride (AlN) identified as the primary corrosion product; (2) Layered flaky exfoliation of TiB2 particles, which accumulate at the boat edges. As a conductive phase, TiB2 induces localized resistance reduction, thereby enhancing current density and heat accumulation, ultimately triggering aluminum melt splashing. These findings may provide critical insights into material degradation mechanisms for optimizing evaporation boat design in composite current collector manufacturing.

Key words: conductive ceramic, TiB2-BN, evaporation boat, aluminum plating, corrosion

CLC Number:  TB321

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