Abstract
This paper is devoted to study a structure of SiC-based materials using ultrasonic tomography method. The SiC-based materials were fabricated from preceramic paper using spark plasma sintering (SPS) method. Also as part of the study the Young`s modulus and density of sintered materials were determined and the effect of sintering pressure changing to this parameters value was investigated. The preceramic paper is a composite material including a matrix of organic cellulose fibers and inorganic powder filler (SiC). The sintering temperature and pressure were 2373 K and 20-40 MPa, respectively. The holding time for the sintering process was 10 min. The density of sintered materials was investigated by the hydrostatic weighing method. Ultrasonic tomography was implemented using of single-channel sensor at 10 MHz frequency.
Highlights
One of the key development factors for industry is an ensuring the safe operation of installations and constructions in facilities
This paper describes the opportunity to conduct ultrasonic tomography of SiC-based materials synthesized by spark plasma sintering (SPS) of preceramic papers
Based on the obtained values, it can be seen that the density of the SiC-based materials increases with pressure applied to the preceramic paper during sintering
Summary
One of the key development factors for industry is an ensuring the safe operation of installations and constructions in facilities. The potential to use SiC-based materials in industry is due to the physicochemical properties of this compound: heat resistance, mechanical strength at a relatively low material density, high corrosion resistance etc. These characteristics cause the widespread application of SiC-based compounds as materials for gas turbines, elements of combustion engines, machining tools as well as constructional materials of the nuclear industry, aircraft and shipbuilding. The defect arising in the material structure can significantly affect the mechanical characteristics of the products. Non-destructive testing of products allows to detect internal defects and to prevent the further increasing of their size. The ultrasonic effect to material is used for determining the elastic properties of the material (Young's modulus) without destroying the experimental sample [4]
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