Solar Powder Metallurgy: Preparation of TiC _ TiB2 Ceramic Foam

7th International Conference on Advanced Materials and Structures

Kováik, J.^1 ; Dvorák, T.^1 ; Emmer, Š.^2 ; Rodriguez, J.^3 ; Cañadas, I.^3

Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Dúbravská cesta 9, Bratislava

84513, Slovakia^1

IVMA STU, Pionierska 15, Bratislava

831 02, Slovakia^2

Plataforma Solar de Almeria, Ctra de Senes Km 4, Tabernas (Almeria)

04200, Spain^3

关键词: 3-D shape;    Argon atmospheres;    Foaming temperature;    Green compacts;    Ignition temperatures;    Optimal heating;    Powder mixtures;    Self propagating high temperature synthesis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/416/1/012032/pdf
DOI  :  10.1088/1757-899X/416/1/012032

来源: IOP

【 摘 要 】

The solar powder metallurgy was used to prepare TiC-TiB2 ceramic foams in 40kW horizontal solar furnace at Plataforma Solar de Almeria (PSA), Spain. The foams were prepared using self-propagating high-temperature synthesis from the green compacts of powder mixture of Ti + 15 vol.% B4C. The foaming was performed under protective argon atmosphere at various heating rates. It was shown that it is possible to prepare successfully TiC-TiB2 ceramic foams with porosity around 45%. The foaming temperature or ignition temperature was found to be around 1380 °C. The optimal heating rate for foam preparation was found to be 220°C/min. It was confirmed that 2 pieces of precursor will join successfully to create single foam. Further, graphite and alumina moulds were tested for possible preparation of 3D shapes. The EDS investigations confirmed the creation of TiB2, TiC and complex TiBxC1-x phases.