Acoustical and thermo physical properties of metal-ceramics composites in dependence on few volume concentration of metal

3rd International Conference on Competitive Materials and Technology Processes

Abramovich, A.^1

St. Petersburg State Technological University of Plant Polymers, St. Petersburg State University, Physical Department St. Petersburg, Russia^1

关键词: Adiabatic calorimeters;    Ceramics composites;    Micro-heterogeneous;    Modern construction materials;    Thermo-conductivity;    Thermo-physical property;    Ultrasonic methods;    Volume concentration;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/123/1/012053/pdf
DOI  :  10.1088/1757-899X/123/1/012053

来源: IOP

【 摘 要 】

Metal-ceramics composites (cermets) are modern construction material used in different industry branches. Their strength and heat resistance depend on elastic and thermos physical properties. In this work cermets based on corundum and stainless steel (sintered in high vacuum at temperatures 1500 - 1600°C) are investigated. The volume steel concentration in the samples varies up 2 to 20 vol %. The elastic modules were measured by ultrasonic method at room temperature, measuring of thermo conductivity coefficient were carried out at temperatures 100, 200°C by method of continued heating in adiabatic calorimeter. We founded appearance of two extremes on dependences of elastic modules (E, G) on stainless steel concentrations, nature of which is unknown, modules values change in range: E = 110 - 310, G = 60 - 130GPa (for different temperatures of sintering). Similar dependence is observed for thermo conductivity coefficient which values varies up 10 to 40 W/(m.K). There is presented also discussion of results based on structure cermet model as multiphase micro heterogeneous media with isotropic physical properties in the work.