Synthesis of Zr-Si-O-N phases by carbonitriding reaction. Characterization of crystalline phases using the Rietveld method

Materials Research

A.d. Mazzoni¹  M.s. Conconi¹  E.f. Aglietti¹ 

[1] ,Centro de Tecnología de Recursos Minerales y CerámicaBuenos Aires

关键词: ZrC;    ZrN;    beta"-phases;    Rietveld;   

DOI  :  10.1590/S1516-14392001000200012

来源: SciELO

【 摘 要 】

Zirconium compounds are of great interest for ceramic application due to their excellent thermal and mechanical properties. Zirconium phases of the system Zr-O-C-N were obtained using carbonitriding reactions of zircon mineral (ZrO2.SiO2), under different reaction conditions. The reaction products were studied by X-ray diffraction (XRD) using the Rietveld method. Silicon was employed as internal standard. Zirconium compounds formed were m-ZrO2 (monoclinic), beta"-zirconium oxynitride and a cubic Zr(C,N,O) phase whose lattice parameter a o depends on the composition. The crystallite sizes of the three zirconium phases were determined also by XRD. The minority phases present are the ones of the Si-O-N-C system. The reaction conditions employed allows to obtain reaction products with low or without silicon content.

【 授权许可】

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