Dr. Alagiriswamy A A , Asst. Professor, Dept. of Physics, SRM-U, Chennai Dr. Alagiriswamy A A, (M.Sc, PhD, PDF) Asst. Professor (Sr. Grade), Dept. of Physics & Nanotechnology, SRM- University, Kattankulathur campus, Chennai Mar. 18/2014 UNIT III Lecture 2
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Dr. Alagiriswamy A A, Asst. Professor, Dept. of Physics, SRM-U, Chennai Dr. Alagiriswamy A A, (M.Sc, PhD, PDF) Asst. Professor (Sr. Grade), Dept. of Physics.
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Dr. Alagiriswamy A A, Asst. Professor, Dept. of Physics, SRM-U, Chennai
Dr. Alagiriswamy A A, (M.Sc, PhD, PDF)Asst. Professor (Sr. Grade),
Dept. of Physics & Nanotechnology, SRM-University,
Kattankulathur campus, Chennai
Mar. 18/2014
UNIT III
Lecture 2
Dr. Alagiriswamy A A, Asst. Professor, Dept. of Physics, SRM-U, Chennai
Dr. Alagiriswamy A A, Asst. Professor, Dept. of Physics, SRM-U, Chennai
Stents as SMAs
Before I proceed
Ability to bend, stay bent, and regain its shapeUses internal atomic arrangement to recognize their shapesAustentite (high temperature cubic phase) & Martensite (low temperature deformed or twinned phase)
Dr. Alagiriswamy A A, Asst. Professor, Dept. of Physics, SRM-U, Chennai
Metallic Glass: A Revolution of Metallurgy
• Metallic glass = Amorphous metal– Metals (have long range order, ductility, malleability, lusture)– Glasses (lack of long range order – short range order, no
crystallinity features )– It's called metallic glass, and it shines like a mirror, but when
you drop a piece of it to the floor, it doesn't break. In fact, it bounces--wildly--thanks to its unusual atomic structure
– can it be called as a liquid metal – Conventional metals crystallize when cooled from a liquid to a
solid. But metallic glass cools to an amorphous (glassy) structure, making it much stronger, lighter, and springier than other metals--and virtually corrosion-proof
– low hysteresis (may be a soft magnetic)
Dr. Alagiriswamy A A, Asst. Professor, Dept. of Physics, SRM-U, Chennai
X-ray spectrum of ………..
(a) crystalline material and (b) amorphous material