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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >Spark plasma sintering and hot pressing of ZrB_2-MoSi_2 ultra-high-temperature ceramics
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Spark plasma sintering and hot pressing of ZrB_2-MoSi_2 ultra-high-temperature ceramics

机译：ZrB_2-MoSi_2超高温陶瓷的火花等离子体烧结和热压

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ZrB_2 + 15 vol.% MoSi_2 composites were densified by spark plasma sintering and conventional hot pressing at the same sintering conditions, i.e. maximum temperature: 1750 ℃, applied pressure: 30 MPa and heating rate: 100-150 K/min. The densification behaviour was investigated through the analysis of the hot pressing and spark plasma sintering shrinkage curves. The microstructures were analyzed and compared in order to understand the influence of the two sintering techniques. The following mechanical properties were measured: Vickers hardness, fracture toughness, Young's modulus and 4-pt bending strength. The main outcome of the present work is that when the ZrB_2-based composite was densified either by spark plasma sintering or by hot pressing using the same sintering parameters, no differences were observed in terms of microstructural features and mechanical properties.
机译：在相同的烧结条件下，即最高温度：1750℃，施加压力：30 MPa，加热速率：100-150 K / min，通过火花等离子体烧结和常规热压对ZrB_2 + 15 vol。％MoSi_2复合材料进行致密化。通过热压和火花等离子烧结收缩曲线的分析研究了致密化行为。分析和比较了微观结构，以了解两种烧结技术的影响。测量了以下机械性能：维氏硬度，断裂韧性，杨氏模量和4点弯曲强度。当前工作的主要结果是，当通过火花等离子体烧结或通过使用相同的烧结参数通过热压使ZrB_2基复合材料致密化时，在微观结构特征和力学性能方面均未观察到差异。

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