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    Volume 6, Issue 1

    Hole Surface Formation Mechanism of Al2O3 Ceramic Based on Sintering Diamond Bits

    (Received 20 February 2017; accepted 6 June 2017)

    Published Online: 2017

    CODEN: MPCACD

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    Abstract

    This paper studied surface formation mechanism of alumina (Al2O3) ceramic holes using sintering diamond bits. First, critical cutting loads and average cutting loads of single abrasive particles were calculated through theoretical analysis; secondly, scanning electron microscope (SEM) examination was carried out to further study the hole surface removal mechanism. The results show the following: (1) theoretical analysis shows that the minimum value of an average load of single abrasive particles is much bigger than the critical cutting load of engendering transverse crackle and that Al2O3 ceramic is removed mainly by the form of brittle fracture; (2) SEM analysis reveals that the machined surface is formed by concave pits (caused by brittle fracture) and groove scratches (caused by plastic deformation), and characters of brittle fracture are dominant; (3) brittle fracture mainly includes cleavage fracture, transgranular fracture, intergranular fracture, spalling removal, etc.; (4) the grinding surface also has a damage zone with different characteristics, such as stomatal zones, loose zones, remnant crackles, etc.

    Author Information:

    Gao, Chao
    Department of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang

    Wang, Sheng
    Department of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang

    Wang, Hui
    Department of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang


    Stock #: MPC20170024

    ISSN:2379-1365

    DOI: 10.1520/MPC20170024

    Author
    Title Hole Surface Formation Mechanism of Al2O3 Ceramic Based on Sintering Diamond Bits
    Symposium ,
    Committee C28