Żrodowski Łukasz, Wróblewski Rafał, Choma Tomasz, Rygier Tomasz, Rosiński Marcin, Morończyk Bartosz, Kasonde Maweja, Leonowicz Marcin, Jaroszewicz Jakub, Ostrysz Mateusz, Łacisz Wojciech, Błyskun Piotr, Pomian Karolina
Faculty of Materials Science and Engineering, Warsaw University of Technology, Woloska 141 St., 02-507 Warsaw, Poland.
R&D Department, AMAZEMET Sp. z o.o., Al. Jana Pawła II 27, 00-867 Warsaw, Poland.
Materials (Basel). 2021 Oct 7;14(19):5862. doi: 10.3390/ma14195862.
The GeniCore Upgraded Field Assisted Sintering Technology U-FAST was applied to the sintering of a commercial Zr-based bulk metallic glass powder AMZ4. The XRD, SEM and DSC analysis of the sintered compacts showed the benefit of the U-FAST method as an enabler for the production of fully amorphous samples with 100% relative density when sintering at 420 °C/480 s (693 K/480 s) and 440 °C/ 60 s (713 K/480 s). The hardness values for fully amorphous samples, over HV1 519, surpass cast materials and 1625 MPa compressive strengths are comparable to commercial cast products. The advantage of the U-FAST technology in this work is attributed to the high heating and cooling rates inherent to ultra-short pulses, which allow to maintain metastable structures and achieve better temperature control during the process. Increasing sintering temperature and time led to the crystallization of the materials. The geometry and material of the dies and punch determine the thermal inertia and pressure distribution inside the compacts, thus affecting the properties of the near net shape NNS compacts made using the U-FAST device.
将GeniCore升级版的场辅助烧结技术U-FAST应用于商业用锆基块状金属玻璃粉末AMZ4的烧结。对烧结体进行的X射线衍射（XRD）、扫描电子显微镜（SEM）和差示扫描量热法（DSC）分析表明，U-FAST方法具有优势，在420℃/480秒（693K/480秒）和440℃/60秒（713K/480秒）烧结时，它能够促成生产出相对密度为100%的完全非晶态样品。完全非晶态样品的硬度值超过HV1 519，超过了铸造材料，并且1625MPa的抗压强度与商业铸造产品相当。这项工作中U-FAST技术的优势归因于超短脉冲固有的高加热和冷却速率，这使得在过程中能够维持亚稳结构并实现更好的温度控制。提高烧结温度和时间会导致材料结晶。模具和冲头的几何形状及材料决定了压坯内部的热惯性和压力分布，从而影响使用U-FAST装置制造的近净形（NNS）压坯的性能。
