Neutron guides are used to transport slow neutrons from sources experiments. Conventional neutron supermirror use alternating thin layers based on nickel and titanium. Due the magnetic properties of nickel, their reflection spin-dependent, in particular when exposed high fields. Motivated by requirements precision experiments beta decay, we present novel supermirrors copper titanium, which pres...

Shape Memory Alloys (SMAs) coatings of NiTi and NiTiHf have been deposited onto Si substrates using pulse DC sputtering. Coatings of NiTi with compositions containing 45 to 65 at% Ti have been fabricated by co-sputtering NiTi with Ti. NiTiHf coatings with Hf compositions ranging from 2 to 30 at% Hf have been fabricated by co-sputtering NiTi with Hf. XRD results reveal the as-deposited coatings ...

This paper presents the development of an endoscopic continuum robot for surgical obesity treatment using a transgastric approach. This proposed transgastric gastroplasty approach performs suturing and resizing of a stomach from inside, aiming at further reducing postoperative complications by avoiding the use of skin incisions. The presented design can be inserted into the stomach in a folded ...

Prior studies have examined fatigue growth of surface cracks in vacuum to simulate sub-surface growth in Ti-alloys and Ni-base superalloys. Even with the highest vacuum level attained using “state-of-the-art” pumps, it is unclear if conditions of internal crack growth are truly simulated. We consider thermodynamics of the oxidation process to help answer this question. This consideration helps ...

···················································································································i TABLE OF CONTENTS ······························································································ iii LIST OF FIGURES ······································································································· iv LIST OF TABLES ·························...

A novel Shape Memory Alloy (SMA) actuator consisting of a number of thin NiTi bers woven in a counter rotating helical pattern around supporting disks is rst described. This structure can be viewed as a parallel mechanism used to accomplish a highly e cient transformation between force and displacement. The actuator overcomes the main mechanical drawback of shape memory alloys, that being limit...