Structural properties of zirconia/alumina composites prepared by various techniques

• Main Authors: Shano, Ahmed M., Khadhir, Sabah Ali, Mohammed, Adnan A., Adnan, Suzan K., Ahmed, Omar A.
• Format: Conference Proceeding
• Language: English
• Subjects: Aluminum; Aluminum nitrate; Aluminum oxide; Ammonia; Chemical precipitation; Composite materials; Diffraction patterns; Fourier transforms; Hydroxides; Infrared radiation; Phases; Raw materials; Sintering; Sintering (powder metallurgy); Zirconium dioxide
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0161559

In this study, prepared the zirconia-alumina composites powders with weight ratios using aqueous aluminum nitrate and aqueous zirconia nitrate according to the molar fraction method of (A1) sample and using the molar fraction method in finding the weight ratios for each of the raw materials used in the preparation of the composites according to the following formula (ZrO2 (0.3-AI2O3(0.7)) and the ratio (2 from aluminum and 1 from zirconium) is from the raw materials, and the second sample (A2) according to the traditional ceramic method of direct quantities and is in a ratio (1 to 1) from the raw materials and by the method of common chemical precipitation and using dilute ammonia with a concentration of 30-33 The acidic function=10 as a strong base for precipitation to obtain the hydroxides of the materials and the sintered primary sintering at Heat of 600 oC for 4 hours and then a final sintering at 1300 oC for four hours. X-ray diffraction pattern spectroscopy (XRD-patterns) of the compound powders prepared at a temperature of (1300 oC) showed that the first sample was at the weight ratio A1 of the primary alumina-button superimposed and formed with two different phases, phase α-AI2O3 and orthogonal phase of zirconia t-zro2. As for the second sample the predominant phase is the orthogonal phase of zirconia t-zro2 with some phases of alumina. Fourier transformations of the infrared spectrum (FTIR) of the powders prepared at a temperature of (1300 oC) showed that they formed the required phases and were pure due to the high sintering temperature and were within the numbers less than (1000cm−1).