Abstract
Chromium carbide nanopowders were synthesized by mechanical alloying-assisted microwave heating. The effect of gamma irradiation on phase composition and microstructure of chromium carbide nanopowders synthesized by the microwave heating method was analyzed. The samples were characterized by X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM) techniques. The results showed that well-dispersed chromium carbide nanopowders can be synthesized by maintaining the temperature at 1000 °C for 1 h. Gamma ray irradiation had an important effect on the microstructure of chromium carbide nanopowders. The interplanar spacings of chromium carbide (110) crystal faces before and after gamma ray irradiation were 0.3725 nm and 0.3824 nm, respectively. The crystal structure of chromium carbide was changed by gamma ray irradiation. Gamma ray irradiation can also increase the binding energy of chromium carbide, which is beneficial to improve the thermal stability and mechanical properties of chromium carbide at high temperature.
Highlights
The transition metal carbides have attractive mechanical properties, outstanding corrosion properties, positive temperature coefficients of resistivity, and permanent non-magnetizability [1]
The results showed that gamma caused single-wall carbon nanotubes (SWCNT) covalent functionalization, and the degree of disorder in the carbon nanotube irradiation resulted in awith detectable decreasedose
Cr3 C2 nanopowders were synthesized via mechanical alloying and subsequent microwave heating
Summary
The transition metal carbides have attractive mechanical properties (e.g., excellent strength, hardness, anti-erosion qualities), outstanding corrosion properties, positive temperature coefficients of resistivity, and permanent non-magnetizability [1]. The direct and fast heating enhanced by the presence of carbon, led to the method for the synthesis of ceramic materials [14] It generates heat within the material, which synthesis of pure carbides in a reduced time, with very crystalline, fine particles presenting excellent spreads in the entire volume, and can save energy and time [15]. Gamma irradiation carbon,valuable led to thetool synthesis of pure carbides in a reduced time, with very crystalline, fineray particles with presenting different strengths is ainteresting powerfulmorphology physical treatment that can produce structural ordering and excellent and [16]. Naim et al [22] reported the effect of gamma irradiation on structure of single-wall carbon nanotubes (SWCNT) Their results showed that gamma irradiation the mechanical properties of a PVC/ZnO polymer nanocomposite. Results may be helpful to investigate the mechanism of the interaction between gamma ray and carbideand materials
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