Method for obtaining texture topography of alumina-based binary eutectic melt growth ceramic
A technology based on binary eutectic and melt growth, which is applied in the field of material processing engineering, can solve problems such as the inability to retain the solid-liquid interface morphology, the difficulty of microstructure, and the difficulty of experimental analysis, so as to make up for the lack of thermal conductivity and improve solid Phase temperature gradient, the effect of increasing the superheat of the melting zone
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Embodiment 1
[0032] This embodiment is a method of obtaining Al through melting and directional solidification in the laser levitation zone. 2 o 3 / YAG binary eutectic melt growth method for the microstructure and interface morphology of ceramics, the number of directional solidified preforms is 13, and the specific process includes the following steps:
[0033] The first step is to make the prefabricated body; Al 2 o 3 and Y 2 o 3 Two powders with a purity of 4N according to Al2 o 3 / YAG eutectic components are mixed and put into a mortar, 10% PVA binder is added, the powder is mixed and ground by conventional methods until there is no agglomerated lump; 10 grams of the mixed powder is put into the cavity with a size of In a 68×10mm mold, the mold is clamped and pressurized at 25MPa, and the pressure is kept for 5 minutes, and the powder is pressed into a plate of about 68×10×5mm to form a blank of the preform; the blank of the pressed preform is processed under the atmosphere Sinte...
Embodiment 2
[0037] This embodiment is a method of obtaining Al through melting and directional solidification in the laser levitation zone. 2 o 3 The microstructure and interface morphology of EAG binary eutectic melt growth ceramics, the number of directional solidified preforms is 14, and the specific process includes the following steps:
[0038] The first step is to make the prefabricated body; Al 2 o 3 、Er 2 o 3 Two kinds of powder Al with a purity of 4N 2 o 3 / EAG eutectic components are mixed and placed in a mortar, 10% PVA binder is added, the powder is mixed and ground by conventional methods until there is no agglomerated lump; 10 grams of the mixed powder is put into the cavity with a size of In a 68×10mm mold, the mold is clamped and pressurized at 25MPa, and the pressure is kept for 5 minutes, and the powder is pressed into a plate of about 68×10×5mm to form a blank of the preform; the blank of the pressed preform is processed under the atmosphere Sintering, in order t...
Embodiment 3
[0042] This embodiment is a method of obtaining Al through melting and directional solidification in the laser levitation zone. 2 o 3 / GAP method for the microstructure and interface morphology of binary eutectic melt growth ceramics, the number of directional solidified preforms is 15, and the specific process includes the following steps:
[0043] The first step is to make the prefabricated body; Al 2 o 3 、Gd 2 o 3 Two powders with a purity of 4N according to Al 2 o 3 / GAP eutectic components are mixed and placed in a mortar, 10% PVA binder is added, the powder is mixed and ground by conventional methods until there is no agglomerated lump; 10 grams of the mixed powder is put into the cavity with a size of In a 68×10mm mold, the mold is clamped and pressurized at 25MPa, and the pressure is kept for 5 minutes, and the powder is pressed into a plate of about 68×10×5mm to form a blank of the preform; the blank of the pressed preform is processed under the atmosphere Sint...
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