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Title: Additive manufacturing and mechanical characterization of high density fully stabilized zirconia

Journal Article · · Ceramics International
 [1];  [1];  [1];  [1];  [1]
  1. Missouri University of Science and Technology, Rolla, MO (United States)

Mechanical properties of additively manufactured 8 mol% yttria-stabilized zirconia (8YSZ) parts were extensively studied for the first time. A novel freeform extrusion fabrication process, called Ceramic On-Demand Extrusion (CODE), was employed to deposit an aqueous viscous suspension (~50 vol% solids loading) of fully stabilized zirconia powder in a layer-by-layer fashion. Each layer was exposed to infrared radiation after deposition to attain partial solidification due to drying. Before exposure, the layer was surrounded by oil to preclude non-uniform evaporation, which could cause warpage and crack formation. After the fabrication process was completed, the parts were humid-dried in an environmental chamber and densified by sintering under atmospheric pressure. Here standard test methods were employed to examine the properties of sintered parts including density, Vickers hardness, fracture toughness, Young's modulus, and flexural strength. Microstructural evaluation was also performed to observe the microstructural morphology and measure grain size. The results indicate that the properties of 8YSZ parts produced by the CODE process match those obtained by conventional fabrication techniques.

Research Organization:
Univ. of Missouri, Columbia, MO (United States); Missouri Univ. of Science and Technology, Rolla, MO (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE); Missouri University of Science and Technology
Grant/Contract Number:
FE0012272
OSTI ID:
1533618
Alternate ID(s):
OSTI ID: 1414340
Journal Information:
Ceramics International, Vol. 43, Issue 8; ISSN 0272-8842
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 53 works
Citation information provided by
Web of Science

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