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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >The effect of different powder particle size on mechanical properties of sintered alumina, resin- and glass-infused alumina.
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The effect of different powder particle size on mechanical properties of sintered alumina, resin- and glass-infused alumina.

机译:不同粉末粒径对烧结氧化铝,树脂和玻璃注入氧化铝力学性能的影响。

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In this study, the compaction and sintering behavior of fine alumina powders of different particle sizes and the effect of matrix particle size on biaxial strength and fracture toughness of infused matrices were investigated. Three different alumina powders, In-Ceram alumina, A16SG, and RC172 were selected, representing a range of particle size and shape. RC172 and A16SG were dry-pressed. In-Ceram alumina was slip-cast following manufacturer's recommendations. Dry-pressed ceramic blocks were sectioned into disks with a thickness of 1.5-mm. Uninfused disks were sintered at four temperatures between 1250 degrees C and 1400 degrees C. For glass or resin infused specimens, alumina disks were sintered at 1250 degrees C for 2 h and separated into two groups for glass infusion and resin (UDMA/TEGDMA) infusion. Disks were tested for biaxial flexural strength with a universal testing machine (Instron) at 0.5-mm/min crosshead speeds. One-way ANOVA and Duncan's multiple range tests revealed that alumina disks with different smaller particle sizes have significantly higher biaxial strength (p < 0.05). The strength of the alumina matrix was greatly increased by glass and resin infusion. The biaxial strength of resin-infused alumina increased as particle size decreased, whereas strength of glass-infused alumina was constant.
机译:在该研究中,研究了不同颗粒尺寸的细氧化铝粉末的压实和烧结行为及基质粒度对脱脂基质的双轴强度和断裂韧性的影响。选择三种不同的氧化铝粉末,内含物氧化铝,A16Sg和RC172,代表一系列粒度和形状。 RC172和A16SG干洗。在陶瓷氧化铝之后的制造商的建议之后是Slip-Cast。将干压的陶瓷块分成厚度为1.5mm的盘。在1250℃和1400℃之间的四个温度下烧结未灌注的盘。对于玻璃或树脂注入标本,氧化铝盘在1250℃下烧结2小时,并分成两组用于玻璃输注和树脂(UDMA / TEGDMA)输注。使用0.5毫米/分钟的十字头速度使用通用测试机(Instron)进行双轴弯曲强度测试磁盘。单向ANOVA和Duncan的多个范围测试显示,具有不同较小粒径的氧化铝磁盘具有显着高的双轴强度(P <0.05)。玻璃和树脂输注大大增加了氧化铝基质的强度。树脂注入氧化铝的双轴强度随着粒度降低而增加,而玻璃注入氧化铝的强度是恒定的。

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