Microfabrication of Net Shape Zirconia/Alumina Nanocomposite Micro Parts

Abstract

Recently, there are growing demands in manufacturing of net shape micro parts for wide range of applications due to the increasing interest in miniaturization. In this paper, the fabrication of tetragonal phase zirconia/alumina (YSZ/Al2O3) nanocomposite micro-parts with high quality is presented. The fabrication process is based on soft lithography and colloidal powder dispersion. Experimental results showed that by optimizing the soft lithography and the dispersion process, it was possible to produce high-resolution micro-parts with well dispersed alumina. The X-ray diffraction results had confirmed the important role of the alumina particles in eliminating the emergence of monoclinic phase while the microstructures reveal a pure tetragonal phase. In addition, the sintered YSZ/Al2O3 micro parts achieved micro hardness with 20% superior to the pure YSZ sintered micro-parts with the addition of 5% alumina.

Effect of the preparation techniques of photopolymerizable ceramic slurry and printing parameters on the accuracy of 3D printed lattice structures

“…There is a rapidly growing demand for lattice structures in the industry for various applications ranging from porous bio ceramics in regenerative medicine, reducing the weight of parts for industrial applications, for optical applications, as well as monolithic supports for catalytic applications [1][2][3][4][5][6][7][8]. However, their manufacturing is impossible via well-established conventional methods.…”

Chemical- and Mechanical-Induced Lubrication Mechanisms during Hot Rolling of Titanium Alloys Using a Mixed Graphene-Incorporating Lubricant

“…The iron oxide scale locates mainly inside the wear marks, but there are still some iron oxide scales distribute outside the wear mark, which are the wear debris produced from the upper testing ball during friction. In the wear marks, the Zr element also presents similar distribution tendency with P and Na, which shows that ZrO2 nano particles possess some lubricating performance during hot tribological process [42,43]. The composition of graphene is not detected, which means that the graphene is exhausted at this temperature.…”

Numerical Simulation of Sintering of DLP Printed Alumina Ceramics

“…Due to the fact that the fabrication of complex 3D objects through the subsequent addition of adjacent bidimensional layers has been proven feasible and successfully employable to a wide range of applications, AM has generated significant interest due to its ability to produce net shape or near-net shape components even at small scales [2]. Fine geometric details and structural features, otherwise unobtainable via conventional manufacturing routes, are reproducible with AM techniques, frequently resulting in improved mechanical performances and characteristics [3][4][5].…”