Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
권호 표지

Evaluation of Micro End-Milling Characteristics of AlN-hBN Composites Sintered by Hot-Pressing

열간가압소결에 의해 제조된 AlN-hBN 복합재료의 마이크로 엔드밀링 가공특성 평가

  • Baek, Si-Young (Division of Mechanical Engineering, Inha University) ;
  • Cho, Myeong-Woo (Division of Mechanical Engineering, Inha University) ;
  • Seo, Tae-Il (Department of Mechanical Engineering, Incheon University)
  • Received : 2008.03.06
  • Published : 2008.06.22
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Abstract

The objective of this study is to evaluate various machining characteristics of AlN-hBN machinable ceramics in micro end-milling process for its further application. First, AlN based machinable ceramics with hBN contents in the range of 10 to 20vol% were prepared by hot-pressing. Material properties of the composites, such as relative density, Vickers hardness, flexural strength, Young's modulus and fracture toughness were measured and compared. Then, micro end-milling experiments were performed to fabricate micro channels using prepared system. During the process, cutting forces, vibrations and AE signals were measured and analyzed using applied sensor system. Machined micro channel shapes and surface roughness were measured using 3D non-contact type surface profiler. From the experimental results, it can be observed that the cutting forces, vibrations and AE signal amplitudes decreased with increasing hBN contents. Also, measured surface roughness and profiles were improved with increasing hBN contents. As a result of this study, optimum machining conditions can be determined to fabricate desired products with AlN-hBN machinable ceramics based on the experimental results of this research.

Keywords

Acknowledgement

Supported by : 인하대학교

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