TiB的烧结,机械和光学性能2 复合材料具有和没有高能压
Simone Taraborelli1,2, Simone Failla1, Elisa Sani3
1Institute of Science, Technology and Sustainability for Ceramic, National Research Council of Italy, Via Granarolo 64, I-48018 Faenza, Italy.
Nanomaterials (Basel, Switzerland)
|October 14, 2023
概括
二化物 (TiB2) 陶在较低的温度下使用添加剂成功烧结,提高了硬度和断裂性. 高能压进一步提高了太阳能应用的密度和光学性能.
科学领域:
- 材料科学 材料科学 材料科学
- 陶工程 陶工程
背景情况:
- 二化物 (TiB2) 具有出色的硬度和耐磨性,适用于装甲和切削工具.
- 低断裂性和高烧结温度限制了TiB2的实际应用.
- 烧结添加剂可以通过与氧化物反应并形成二次相来改善TiB2的可加工性和机械性能.
研究的目的:
- 研究不同制备方法和添加剂对TiB2.2烧结的影响.
- 为了优化TiB2陶的热压烧结过程.
- 评估由此产生的TiB2材料的机械和光学性能.
主要方法:
- 热压烧结TiB2使用诸如碳化物 (B4C),化 (Si3N4) 和二化 (MoSi2) 等添加剂.
- 探索各种制备方法,包括使用WC-Co介质进行高能压.
- 密度,硬度,断裂性和光学特性 (光谱选择性和太阳吸收率) 的表征.
主要成果:
- 在1700°C达到几乎完全密集的TiB2,硬度为24.4 GPa,破裂度为5.4 MPa m1/2.2.
- 使用WC-Co介质的高能磨砂样本表现出最高的硬度 (24.5GPa) 和密度,具有核心粒结构.
- 精选的样本,特别是高能磨 TiB2, 显示出优越的光谱选择性和太阳吸收率.
结论:
- 优化的加工和量身定制的成分使TiB2.2的低温烧结成为可能.
- 高能压是一种有效的方法,可以提高TiB2的密度,硬度和光学性能.
- 改进的TiB2材料显示出适用于抗冲击装甲,耐磨涂层和太阳能转换的潜力.
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