Maashaa Dovchinvanchig, Purevdagva Enkhtsetseg, Rubanik Vasili V, Rubanik Vasili V
Department of Physics and Mathematics, School of Applied Sciences, Mongolian University of Life Sciences, Ulaanbaatar 17024, Mongolia.
Institute of Technical Acoustics of National Academy of Science of Belarus, 210009 Vitebsk, Belarus.
Materials (Basel). 2023 Sep 9;16(18):6134. doi: 10.3390/ma16186134.
Porous Ni-Ti shape memory alloys (SMAs) have been widely studied in biomedical and engineering applications. Porous Ni-Ti SMAs were obtained via self-propagating high-temperature synthesis (SHS), and their microstructure, phase transformation, and mechanical properties were investigated. This article presents the results of a study of changes in the microstructure, phase transformation, and mechanical properties of porous Ni-Ti SMAs when Ni and Ti metal powders were preliminarily subjected to ultrasonic activation at various periods. It was determined that the porosity of the obtained alloy samples was 62-68 vol%. The microstructure was composed of the main matrix Ni-Ti phase and the accompanying Ti and Ti-Ni phases. The results show that the hardness 34.1-86.8 HB and elastic modulus 4.2-10.8 GPa increased with an increase in the ultrasonic activation time of the samples. The phase transformation temperature of the Ni-Ti shape memory alloy remained almost unchanged under the influence of ultrasonic treatment.
多孔镍钛形状记忆合金（SMA）在生物医学和工程应用中已得到广泛研究。通过自蔓延高温合成法（SHS）制备了多孔镍钛形状记忆合金，并对其微观结构、相变和力学性能进行了研究。本文介绍了在不同时间段对镍和钛金属粉末进行超声激活预处理时，多孔镍钛形状记忆合金的微观结构、相变和力学性能变化的研究结果。结果表明，所获得的合金样品的孔隙率为62 - 68体积%。微观结构由主要基体镍钛相以及伴随的钛和钛镍相组成。结果表明，随着样品超声激活时间的增加，硬度从34.1 - 86.8 HB以及弹性模量从4.2 - 10.8 GPa均有所增加。在超声处理的影响下，镍钛形状记忆合金的相变温度几乎保持不变。
