High speed end-milling characteristics of pre-sintered Al2O3/Y-TZP ceramic composites for dental applications

Abstract

Yttria-stabilized tetragonal zirconia polycrystalline (Y-TZP) ceramics have been utilized as a restorative dental material. Presintered Y-TZP ceramics are machined using the Computer-Aided Design and Computer-Aided Manufacturing (CAD/CAM) techniques. In this study, pre-sintered 3 mol % yttria-stabilized zirconia (3Y-TZP) bioceramics reinforced with Al 2 O 3 particles were prepared by sintering at relatively low temperature. The machining characteristics of the developed 3Y-TZP composites were investigated using an end-milling process. A series of experiments were performed on a high speed spindle with several sensors: a tool dynamometer, an acceleration sensor, and an acoustic emission sensor. The tool dynamometer was installed below the work-piece, a three-axis acceleration sensor was installed on the spindle head, and the acoustic emission sensor was installed on the fixture. The machining characteristics of the composites material were evaluated in a high speed machining process under various cutting conditions by changing the cutting speed, depth-of-cut, and feedrate. The machined surface was investigated using SEM photographs.

Machinability and properties of zirconia ceramics prepared by gelcasting method

“…The milling of ceramics in the pre-sintered state has been an important shaping method in dentistry for many years and is also suitable in other engineering areas such as prototype testing and low-series production of parts [1][2][3][4][5]. The machinable ceramic blanks are often produced as pre-sintered ceramic discs compacted by cold isostatic pressing [6][7][8][9][10]. Several processing problems are connected with these blanks.…”

Mechanical Milling and Surface Texturing of 3Y-TZP Ceramics: A Mini Review

“…In recent decades, zirconia ceramics have become much more attractive in modern denture restoration because of their superior physical properties and excellent biocompatibility [1][2][3][4][5][6][7][8][9][10]. These materials represent the most promising restorative bioceramics for fabricating dental prostheses, such as inlays, implant crowns, and fixed bridges [11][12][13].…”

Effect of Spindle Speed on Microstructure and Flexural Strength of Dental Direct Bio Zirconia

“…Seok-Jae et al investigated the machining characteristics of the Y-TZP ceramic in a high-speed machining process under various cutting conditions by varying the velocity, depth-ofcut, and feed rate [15]. For machining Y-TZP green ceramic with a 3 mm diameter cylindrical tool, Anthonin Demarbaix et al recommend a speed of 250 m/min, a feed per tooth of 0.037 mm/tooth, and a depth of cut of 3 mm [16].…”