Abstract The fabrication of Ti-based alloys with enhanced properties for extreme applications is an insatiable quest in the materials engineering field. Optimization of powder metallurgical processing routes is an area of interest for more efficient and cost effective manufacturing techniques. Ti-Zr-Ta alloys of different characteristics have been synthesized from their elemental powders, using Spark Plasma Sintering (SPS): Temperature (1100 °C), Pressure (50 MPa) and holding times (5 min and 10 min) respectively. Microstructures, chemical and phase analyses were conducted using FE-SEM, EDS, Oxygen analyser and XRD. Results revealed significant amount of martensite phase evolution irrespective of the holding time. The evolution of β-Ti phase and decrease in oxygen contents was also noticed with the addition of Ta. Relative density measurement conducted using Archimedes principle revealed the bulk samples had densifications close to theoretical values and micro-hardness of significantly high magnitudes (above 500 Hv). This suggests the suitability of the fabricated products for applications requiring high hardness parameters such in dental technologies.

中文翻译：

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放电等离子烧结Ti-Zr-Ta粉体的致密化和微观结构特征

摘要 为极端应用制造具有增强性能的钛基合金是材料工程领域永无止境的追求。粉末冶金加工路线的优化是更高效和更具成本效益的制造技术的关注领域。使用火花等离子烧结 (SPS)：温度 (1100 °C)、压力 (50 MPa) 和保温时间（5 分钟和 10 分钟）分别由元素粉末合成了具有不同特性的 Ti-Zr-Ta 合金。使用FE-SEM、EDS、氧分析仪和XRD进行显微结构、化学和相分析。结果表明，无论保温时间如何，马氏体相都发生了显着的演变。随着Ta的加入，β-Ti相的演变和氧含量的降低也被注意到。使用阿基米德原理进行的相对密度测量显示，大块样品具有接近理论值的致密化和显着高数量级（高于 500 Hv）的显微硬度。这表明制造的产品适用于需要高硬度参数的应用，例如牙科技术。