Microstructural and mechanical behaviours of Y-TZP prepared via slip-casting and fused deposition modelling (FDM)

Constance L Gnanasagaran; Karthikeyan Ramachandran; Nashrah Hani Jamadon; Vishaal Harikrishna Kumar; Andanastuti Muchtar; Ashwath Pazhani; Beenish Ayaz

doi:10.1016/j.heliyon.2023.e21705

Microstructural and mechanical behaviours of Y-TZP prepared via slip-casting and fused deposition modelling (FDM)

Heliyon. 2023 Oct 29;9(11):e21705. doi: 10.1016/j.heliyon.2023.e21705. eCollection 2023 Nov.

Authors

Constance L Gnanasagaran¹, Karthikeyan Ramachandran^{1

2}, Nashrah Hani Jamadon³, Vishaal Harikrishna Kumar⁴, Andanastuti Muchtar³, Ashwath Pazhani², Beenish Ayaz¹

Affiliations

¹ School of Engineering and the Environment, Kingston University, Roehampton Vale Campus, London, SW15 3DW, United Kingdom.
² School of Mechanical Engineering, Coventry University, Coventry, CV1 2JH, United Kingdom.
³ Department of Mechanical and Manufacturing Engineering, Faculty of Engineering and Built Environment, University Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia.
⁴ Department of Metallurgical Engineering, PSG College of Technology, Coimbatore, India.

Abstract

This paper reports the microstructural characteristics and mechanical properties of yttria-stabilized zirconia prepared via fused deposition modelling and slip casting. X-Ray Diffraction peaks indicated that yttria-stabilized zirconia crystallized in tetragonal structure for both slip casted(SC) and fused deposition modelled(FDM) samples. Further, scanning electron microscopy of slip casted sample showcased closely packed structure with fine grains and an average grain size of ∼65 nm whilst fused deposition modelled samples showcased non-homogeneous pores with ∼20 nm grain size. Average relative density of slip casted samples was ∼99.4 % while that of fused deposition modelled sample exhibited ∼96.2 %. The Vickers Hardness of slip casted (∼15.26 ± 0.4 GPa) was ∼10 % higher than the fused deposition modelled samples (∼13.79 ± 0.3 GPa). Likewise, indentation fracture toughness of slip casted (5.78 ± 0.5 MPa m^1/2) was 14 % higher than fused deposition modelled samples which could have been due to the change in grain size as well as porosity of the ceramics. Compressive strength of the fused deposition modelled samples was 32 % less than slip casted samples (∼510 ± 10 MPa) due to its non-homogenous pores which led to weakening van der Waals force of attraction.

Keywords: Fused deposition modelling; Slip casting; Vickers hardness and indentation fracture toughness; Yttria-stabilized zirconia.