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Pressureless sintering of ZrO2-ZrSiO4/NiCr functionally graded materials with a shrinkage matching process

Title data

Wu, Kangjian ; Scheler, Sven ; Park, Ho-Seon ; Willert-Porada, Monika:
Pressureless sintering of ZrO2-ZrSiO4/NiCr functionally graded materials with a shrinkage matching process.
In: Journal of the European Ceramic Society. Vol. 33 (June 2013) Issue 6 . - pp. 1111-1121.
ISSN 0955-2219
DOI: https://doi.org/10.1016/j.jeurceramsoc.2012.11.026

Official URL: Volltext

Abstract in another language

Shrinkage matching was applied as the basic concept for the processing of five-layered ZrO<sub>2</sub>-ZrSiO<sub>4</sub>/NiCr functionally graded materials (FGMs) by pressureless sintering. Shrinkage behavior of the constituent layers of FGM was matched based on the strategy of reducing the mismatches of shrinkage rate between the adjacent layers by a systematic adjustment of the ZrSiO4 inclusion content and the particle size of ZrO2 matrix. Before shrinkage matching, sintering defects such as warping towards the ceramic-rich side of FGM and cracking in the 100 vol% ceramic layer were generated, due to the relatively high mismatches of shrinkage rate between the ceramic- and the metal-rich sides and at the interface of 100 and 75 vol% ceramic layers, respectively. After shrinkage matching, FGMs without any sintering defects were obtained, whereas the green bodies warped towards the metal-rich side already before sintering, due to the relatively higher shrinkage of the metal-rich side during isostatic pressing.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Functionally graded materials; Pressureless sintering; Shrinkage behavior; Sintering defects
Institutions of the University: Faculties
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Ceramic Materials Engineering
Faculties > Faculty of Engineering Science > Chair Materials Processing
Faculties > Faculty of Engineering Science > Ehemalige Professoren > Chair Materials Processing - Univ.-Prof. Dr. Monika Willert-Porada
Profile Fields
Profile Fields > Advanced Fields
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Faculties > Faculty of Engineering Science > Ehemalige Professoren
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 500 Natural sciences
600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 13 Feb 2015 16:07
Last Modified: 14 Mar 2019 09:29
URI: https://eref.uni-bayreuth.de/id/eprint/6729