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Using metallic additives as a bonding layer to produce Ti-based laminated composites via spark plasma sintering
Journal of Science: Advanced Materials and Devices ( IF 6.7 ) Pub Date : 2021-05-19 , DOI: 10.1016/j.jsamd.2021.04.003
Ehsan Ghasali , Davoud Ghahremani , Yasin Orooji

Ti laminated composites were successfully prepared by employing metallic additive powders between Ti sheets, and using the spark plasma sintering process. Mo, Cr, Si and Co were inserted between Ti layers, and spark plasma sintering was carried out at 1250 °C. Regarding the Ti–Si laminated composite, the final products comprised divided sintered Si and Ti sheets which were not stuck together. A new sample was prepared at a temperature higher than 1850 °C with the appropriate bonding of layers. The XRD patterns revealed dominant Ti peaks in Ti–Cr and Ti–Mo, while, in the intermetallic compounds between Ti and metallic additives of Co, Si peaks were dominant. The FESEM images taken from the samples' cross-section demonstrated the ultra-short-range diffusion of Mo into the Ti sheets. The process was amplified from Cr additives to Co; it appeared that the laminated structure was changed into a uniform one of the Ti–Co alloy. Regarding the Si additive, the laminated structure turned into the intermetallic of Ti5Si3–Ti5Si4 islands and seemed to be the composite. An analysis of the mechanical properties also showed the highest Vickers hardness of 1121 ± 32 HV1 for the Ti–Si sample in terms of the intermetallic nature of the formed sample, whereas the highest bending strength of 998 ± 16 MPa was achieved in the Ti–Cr laminated composite.



中文翻译:

使用金属添加剂作为粘结层通过放电等离子烧结生产钛基层压复合材料

通过在钛片之间使用金属添加剂粉末,并使用放电等离子烧结工艺成功地制备了钛层状复合材料。Mo、Cr、Si和Co插入Ti层之间,并在1250℃下进行放电等离子烧结。关于 Ti-Si 层压复合材料,最终产品包括分开的烧结 Si 和 Ti 片,它们没有粘在一起。新样品是在高于 1850 °C 的温度下制备的,并具有适当的层粘合。XRD图谱显示Ti-Cr和Ti-Mo中的Ti峰占主导地位,而在Ti和Co金属添加剂之间的金属间化合物中,Si峰占主导地位。从样品横截面获取的 FESEM 图像证明了 Mo 超短程扩散到 Ti 片中。该过程从 Cr 添加剂扩大到 Co;似乎层状结构变成了均匀的 Ti-Co 合金。关于Si添加剂,层状结构变成了Ti的金属间化合物5 Si 3 –Ti 5 Si 4岛和似乎是复合物。机械性能分析还表明,就成型样品的金属间化合物性质而言,Ti-Si 样品的最高维氏硬度为 1121±32 HV1,而 Ti-Si 样品的最高弯曲强度达到 998±16 MPa。 Cr层压复合材料。

更新日期:2021-05-19
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