The effect of thermal processing parameters on the microstructure of extruded and sintered TiO2 ceramics

2nd International Conference on Competitive Materials and Technological Processes

Pura, A.^1 ; Locs, J.^1 ; Berzina-Cimdina, L.^1

Rudolfs Cimdins Riga Biomaterials Innovation and Development Centre, Riga Technical University, Riga, Latvia^1

关键词: Bimodal porosity;    Extrusion technology;    Microstructural homogeneity;    Processing parameters;    Single-step;    Sintered samples;    Sintering condition;    Two-step sintering;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/47/1/012019/pdf
DOI  :  10.1088/1757-899X/47/1/012019

来源: IOP

【 摘 要 】

There are no investigations concerning the microstructural homogeneity in cross section of extruded and sintered samples found in literature. In this work TiO2ceramics obtained by extrusion technology is investigated. Samples were sintered under three different sintering conditions: A) 1100 850 °C, B) 1100 °C and C) 1100 1450 °C. Two step sintering at 1100 - 850 °C leads to the formation of denser microstructure (77.2 % of TD) compared to single step sintering at 1100 °C (75.4 % of TD). After thermal treatment there are differences between microstructure in middle and edge part of all samples. Microstructure of samples after each sintering condition is different. Needle-shaped and irregularly shaped grains and bimodal porosity can be found in SEM investigations.