NbTaTiZr double equal atomic ratio high entropy alloy and its preparation method, the preparation method includes the following steps: Step S1, Titanium, ZrH2, Niobium, Tantalum metal powder according to equal atomic ratio added to the ball milling tank for ball milling alloying, NbTaTiZr alloy powder with nanometer grain size is prepared; Step S2, in the sintering pressure of 20 40 MPa, 700 1100℃ under the condition of discharge plasma sintering. The technical scheme of the invention can significantly improve the mechanical properties of the material, reduce the difficulty for the subsequent regulation of Young's modulus, have good biocompatibility, and can meet the requirements of medical metal materials.
Biomedical materials are materials used in the diagnosis, treatment, rehabilitation and prevention of diseases, as well as the replacement of biological tissues and organs, and the enhancement or restoration of their functions. The characteristics of biomaterials include biological functionality and biocompatibility. Biomedical materials are essential to protect human health and are directly related to human health and life safety. With the rapid development of economy, the continuous improvement of living standards, the aging of population and the injection of new technologies, the global biomedical materials industry has developed rapidly and the scale of the industry has been continuously improved. The global biomedical materials market size was valued at US $170.9 billion in 2016 and exceeded US $300 billion in 2020, growing at a CAGR of approximately 16% during 2016-2020. According to the conservative estimate, the scale of the global biomedical materials industry will exceed $600 billion by 2025, and it is becoming a pillar industry of the world economy. The development of biomedical materials is not only an urgent need for social and economic development, but also of great significance to national defense and national security.
At present, titanium and titanium alloys, stainless steel, cobalt-based alloys and biodegradable magnesium alloys have been widely used in clinical practice. At the same time, new bio-metallic materials are emerging, such as high-entropy alloys, powder metallurgy alloys, amorphous alloys and low-modulus titanium alloys. The purpose is to prepare implant materials that meet the requirements of mechanical properties and have good biocompatibility. Among the many elements, the elements satisfying biocompatibility include Ti, Zr, Hf, Nb, Ta, Cr, Mo, etc., which are refractory metals.
NbTaTiZr high-entropy alloy powder with nanometer grain size was prepared by mechanical alloying with Ti, ZrH2, Nb and Ta metals with good biocompatibility as raw materials. Advantage of the characteristics of discharge plasma can fast solution at the same time have good biocompatibility and biological safety, ultra high strength and excellent corrosion resistance, and has the ultrafine grain size NbTaTiZr large pieces of high entropy alloys samples, the scheme will alloy design for duplex system, regulating the proportion of the two phase of different performance requirements, It also significantly improves the mechanical properties of the material, reduces the difficulty for the subsequent regulation of Young's modulus, has good biocompatibility, and can meet the requirements of medical metal materials.
