@article{26be58ff12b64525bd379a88f0f73553,
title = "Processing and Characterization of Liquid-Phase Sintered NiTi Woven Structures",
abstract = "Porous NiTi is of interest for bone implants because of its unique combination of biocompatibility (encouraging osseointegration), high strength (to prevent fracture), low stiffness (to reduce stress shielding), and shape memory or superelasticity (to deploy an implant). A promising method for creating NiTi structures with regular open channels is via 3D weaving of NiTi wires. This paper presents a processing method to bond woven NiTi wire structures at contact points between wires to achieve structural integrity: (i) a slurry consisting of a blend of NiTi and Nb powders is deposited on the surface of the NiTi wires after the weaving operation; (ii) the powders are melted to create a eutectic liquid phase which collects at contact points; and (iii) the liquid is solidified and binds the NiTi woven structures. The bonded NiTi wire structures exhibited lower transformation temperatures compared to the as-woven NiTi wires because of Nb diffusion into the NiTi wires. A bonded woven sample was deformed in bending and showed near-complete recovery up to 6% strain and recovered nearly half of the deformation up to 19% strain.",
keywords = "Mechanical behavior, NiTi, Shape memory, Transient-liquid phase",
author = "Dinc Erdeniz and Weidinger, {Ryan P.} and Sharp, {Keith W.} and Dunand, {David C.}",
note = "Funding Information: The authors acknowledge financial support from the Defense Advanced Research Projects Agency under Award Numbers W91CRB-10-1-0004 (Dr. Judah Goldwasser, program manager). They thank Profs. Kevin Hemker, Tim Weihs, and Jamie Guest (Johns Hopkins University) for useful discussions. This work made use of the EPIC facility of Northwestern University{\textquoteright}s NUANCE Center, which has received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205); the MRSEC program (NSF DMR-1121262) at the Materials Research Center; the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois, through the IIN, and the MatCI Facility which receives support from the MRSEC Program (NSF DMR-1121262) of the Materials Research Center at Northwestern University. Funding Information: The authors acknowledge financial support from the Defense Advanced Research Projects Agency under Award Numbers W91CRB-10-1-0004 (Dr. Judah Goldwasser, program manager). They thank Profs. Kevin Hemker, Tim Weihs, and Jamie Guest (Johns Hopkins University) for useful discussions. This work made use of the EPIC facility of Northwestern University?s NUANCE Center, which has received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205); the MRSEC program (NSF DMR-1121262) at the Materials Research Center; the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois, through the IIN, and the MatCI Facility which receives support from the MRSEC Program (NSF DMR-1121262) of the Materials Research Center at Northwestern University. Publisher Copyright: {\textcopyright} 2018, ASM International.",
year = "2018",
month = mar,
day = "1",
doi = "10.1007/s40830-018-0157-0",
language = "English (US)",
volume = "4",
pages = "70--76",
journal = "Shape Memory and Superelasticity",
issn = "2199-384X",
number = "1",
}