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A kind of layered aluminum oxynitride ceramic composite material and preparation method thereof
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A ceramic composite material, aluminum nitride technology, applied in the field of ceramic materials, can solve the problem of low fracture toughness, achieve the effect of low hardness, improve toughness, and ensure protection
Active Publication Date: 2020-04-28
SINOMA SYNTHETIC CRYSTALS CO LTD +1
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[0004] The invention provides a layered aluminum oxynitride ceramic composite material and a preparation method thereof, in order to solve the problem of low fracture toughness of the single-component AlON ceramic material obtained by sintering, which is often difficult to sinter and compact
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Embodiment 1
[0025] The first layered aluminum oxynitride ceramic composite material is prepared by the following method:
[0026] (1) Select AlON ceramic powder, 80nm composite material powder, 50nm MgO powder and 25μm ZrO powder with an average particle size of 5 μm 2 Powder.
[0027] (2) In terms of weight percentage, take the raw materials for preparing the AlON composite ceramic layer, select molybdenum powder, tungsten powder, Mo 2 C powder and WC powder are mixed as composite material powder, specifically, AlON ceramic powder is 85%, MgO powder is 5%, ZrO 2 Powder is 2%, molybdenum powder is 2%, tungsten powder is 2%, Mo 2 C powder is 2%, WC powder is 2%.
[0028] (3) AlON ceramic powder, composite material powder, MgO powder and ZrO weighed in proportion in step (2) 2 The powders are mixed to obtain a mixed powder.
[0029] (4) Put the AlON ceramic powder and the mixed powder into the planetary ball mill respectively by wet mixing method. During the ball milling process, selec...
Embodiment 2
[0033] The second layered aluminum oxynitride ceramic composite material is prepared by the following method:
[0034] (1) Select AlON ceramic powder, 80nm composite material powder, 50nm MgO powder and 25μm ZrO powder with an average particle size of 5 μm 2 Powder.
[0035] (2) In terms of weight percentage, take the raw materials for preparing the AlON composite ceramic layer, and select molybdenum powder as the composite material powder, specifically, the AlON ceramic powder is 85%, the MgO powder is 5%, and the ZrO powder is 5%. 2 Powder is 2%, molybdenum powder is 8%.
[0036](3) AlON ceramic powder, composite material powder, MgO powder and ZrO weighed in proportion in step (2) 2 The powders are mixed to obtain a mixed powder.
[0037] (4) Put the AlON ceramic powder and the mixed powder into the planetary ball mill respectively by wet mixing method. During the ball milling process, zirconia balls are selected, and absolute ethanol is used as the grinding medium, and ...
Embodiment 3
[0041] The third layered aluminum oxynitride ceramic composite material, in its preparation method, in step (2), tungsten powder is selected as the composite material powder, and other parts are the same as in Example 2, please refer to Example 2, no further elaboration . That is, a layered aluminum oxynitride composite material is obtained.
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technical field [0001] The invention relates to the field of ceramic materials, in particular to a layered aluminum oxynitride ceramic composite material and a preparation method thereof. Background technique [0002] Aluminum oxynitride (AlON) is Al 2 o 3 - An important solid solution in the AlN system, which is a transparent polycrystalline ceramic with a strength and hardness as high as 380MPa and 1800kg / mm 2 , second only to single crystalsapphire, has a good optical transmittance from near ultraviolet (0.2μm) to mid-infrared (6.0μm), therefore, AlON ceramic materials can be used in light protection and armor bulletproof, etc. For material hardness and Toughness has demanding application fields. [0003] In the prior art, the single-component AlON ceramic material obtained by sintering is often difficult to sinter and compact, resulting in low fracture toughness. Therefore, although AlON ceramic materials can meet the hardness requirements, it is difficult to meet t...
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