Effects of Structural Orientation on EDM Properties of Sapphire

• Muttamara Apiwat

  Department of Mechanical Engineering, Nagaoka University of Technology

• Fukuzawa Yasushi

  Department of Mechanical Engineering, Nagaoka University of Technology

• Mohri Naotake

  Department of Precision Machinery Engineering, Tokyo University

• Tani Takayuki

  Department of Mechanical Engineering, Tsukuba College of Technology

Abstract

Precise machining technologies of advanced insulating ceramics are demanded in many industrial fields. Normally Electric Discharge Machining (EDM) utilizes for electrical conductive materials. Recently, insulating materials have been succeeded to machine with the assisting electrode method (AEM) that was proposed by authors. Some ceramics were still recognized as hard materials. Especially the high purity oxide ceramics of Al₂O₃ are difficult to machine for this method. Moreover single crystal Al₂O₃ of sapphire (99.99%) is recognized as the hard machining material for the EDM method. In this paper, EDM of crystallographic planes on 3 different sapphires were carried out. The effects of the crystal orientation were discussed on the machining properties of sapphires.

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 45 (7), 2486-2488, 2004

  The Japan Institute of Metals and Materials

Keywords

• electric discharge machining
• sapphire
• assisting electrode
• crystal orientation

Details

• CRID: 1390001204251810560
• NII Article ID: 10013338026
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.45.2486
• COI: 1:CAS:528:DC%2BD2cXmvFejur8%3D
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 7016355
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7016355
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/45/7/45_7_2486/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed