MgO와 ZrO2가 첨가된 Al2TiO5 세라믹의 열·기계적 물성
Thermo-Mechanical Properties of Al2TiO5 Ceramics Stabilized with MgO and ZrO2 Additives
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The characteristics of Al2TiO5 ceramics were influenced by the additives and the heat treatment that controls the microcrack behavior at grain boundaries. The effect of additives on Al2TiO5 ceramics were investigated in terms of mechanical properties and thermal expansion at high temperature. The Al2TiO5 were synthesized at 1500oC, 1550oC and 1600oC for 2h by reaction sintering. The formation of Al2TiO5 phase was increased by additives that enhanced the volume of the microcrack that can lead to low thermal expansion. The mechanical properties of the stabilized Al2TiO5ceramics were increased remarkably at 1100oC, 1200oC and 1300oC due to the oneset of mechanical healing of grainbondary microcracks at a high temperature. The amount of microcrack was decreased at lower sintering temperature that causes the increase of mechanical properties at high temperature.
Abstract
The characteristics of Al2TiO5 ceramics were influenced by the additives and the heat treatment that controls the microcrack behavior at grain boundaries. The effect of additives on Al2TiO5 ceramics were investigated in terms of mechanical properties and thermal expansion at high temperature. The Al2TiO5 were synthesized at 1500oC, 1550oC and 1600oC for 2h by reaction sintering. The formation of Al2TiO5 phase was increased by additives that enhanced the volume of the microcrack that can lead to low thermal expansion. The mechanical properties of the stabilized Al2TiO5ceramics were increased remarkably at 1100oC, 1200oC and 1300oC due to the oneset of mechanical healing of grainbondary microcracks at a high temperature. The amount of microcrack was decreased at lower sintering temperature that causes the increase of mechanical properties at high temperature.
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