Ti₅Si₃/β-Ti nano-core–shell structure toughened glassy Ti alloy matrix biocomposites

Abstract

ingots were prepared by vacuum arc-melting furnace. Both Ti alloy ribbons of 3-5 mm in width and about 80 mm in thickness were made from bulk samples by an as-quenched technique under an argon atmosphere. Both melt-spun glassy ribbons exhibit large supercooled liquid regions, high reduced glass transition temperatures, and good thermal stabilities. For both alloys, the stable phases after heating are a Ti glassy matrix and in situ nano-Ti 5 Si 3 particles encircled by nano shell of b-Ti. After the Ti 5 Si 3 /b-Ti nano-core-shell structure was in situ formed, in situ Ti 5 Si 3 /b-Ti nano-core-shell structure toughened glassy Ti alloy matrix composites were prepared. For the Ti 66 Zr 11 Si 15 Fe 5 Mo 3 ribbons, its high strength is attributed to both Mo solution strengthening and nano core-shell Ti 5 Si 3 /b-Ti toughening and dispersion strengthening. Observations and analysis on microstructure and fracture morphology of melt-spun glassy ribbons indicated that multi-slip bands were formed during the tensile test.

Glass-Forming Ability and Corrosion Behavior of Ti-Based Amorphous Alloy Ti-Zr-Si-Fe

“…Compared with crystalline Ti-based alloys, amorphous titanium alloys exhibit higher mechanical properties [ 10 , 11 ], low elastic modulus, excellent biocompatibility and high corrosion resistance. With the development of titanium-based amorphous alloys, Ti-rich bulk glassy alloys were found in rapidly solidified Ti-Cu-Al [ 12 , 13 ], Ti-Cu-Ni (Co) [ 14 , 15 , 16 ], Ti-Cu-Zr-Ni [ 17 , 18 ], Ti-Cu-Co-Al-Zr [ 19 ] and Ti-Cu-Ni-Sn (Si) [ 20 , 21 ] systems to date. Since 1988, many alloys with high glass-forming ability and capable of being formed into bulk metallic glasses (BMG) have been discovered more and more, for example, in multicomponent Mg-, La-, Zr-, Fe- and Pd-based metals in the alloy system.…”

Microstructure and Mechanical Properties of Ti6Al4V Alloy Modified and Reinforced by In Situ Ti5Si3/Ti Composite Ribbon Inoculants

“…Titanium matrix composites (TMCs) are widely used as a new type of promising engineering material, due to their high specific strength, low density, excellent corrosion behavior, specific modulus at high temperatures, and attractive fracture-related properties [13,14]. Because of these advantageous properties, TMCs are extensively used in the aerospace industry, petrochemical engineering, biomedical engineering, power generation, and other fields [15,16].…”

“…Because of these advantageous properties, TMCs are extensively used in the aerospace industry, petrochemical engineering, biomedical engineering, power generation, and other fields [15,16]. Recently, TMCs have been actively investigated 2 of 17 in order to improve their comprehensive mechanical properties [14,17,18]. The composite fabrication technology to introduce the hard and stiff particulate reinforcements to a Ti alloy matrix has proved to be an effective approach to increase the strength and hardness of the Ti matrix composites [19][20][21].…”