Length-scales S.J.T.U. Phase Transformation and Applications Angstrom=1A=1/10,000,000,000 meter=10-10m Nanometer 10 nm 1/1,000,000,000 meter =10-9m Micrometer 1um 1/1,000,000 meter 10-6 m Millimeter 1mm 1/1,000 meter 10-3 m Interatomic distance a few A A human hair is 50 um Elongated bumps that make up the data track on CD are ~0.5 um wide,minimum 0.83 um long,and 125 nm high SJTU Thermodynamics of Materials Spring2006©X.J.Jin Introduction
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2006 © X. J. Jin Introduction Angstrom = 1Å = 1/10,000,000,000 meter = 10-10 m Nanometer = 10 nm = 1/1,000,000,000 meter = 10-9 m Micrometer = 1µm = 1/1,000,000 meter = 10-6 m Millimeter = 1mm = 1/1,000 meter = 10-3 m Interatomic distance ~ a few Å A human hair is ~ 50 µm Elongated bumps that make up the data track on CD are ~ 0.5 µm wide, minimum 0.83 µm long, and 125 nm high Length-scales
THE SCALE OF THINGS Things Natural Things Manmade 于角 S.J.T.U. Phase Transformation and Applic 01m t0】色 01n 1cm 出 O独作 一1i料te知n0 0角 0.1mn 0)山 .DIW 0角 001ng 是 角dlood 10 m 01n 100 m Bupunsppun poroe ul sobald 10 m 1agg间 =01 aagw城据n装银装和个e银有e ■ Chirt from http:/www.sc.doe.gov/prodnction/bes/scale_of_things html 00C001m 40%91m 127
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2006 © X. J. Jin Introduction
Interrelationships among materials categories S.J.T.U. Phase Transformation and Applications Biomaterials Metals Composite Optical/Photonic Materials Materials Superconducting Polymers Materials Electronic Catalysts Materials Magnetic Ceramics Materials SJTU Thermodynamics of Materials Spring2006©X.J.Jin Introduction
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2006 © X. J. Jin Introduction Interrelationships among materials categories Biomaterials Superconducting Materials Composite Materials Electronic Materials Magnetic Materials Metals Optical/Photonic Materials Polymers Catalysts Ceramics
The role of thermodynamics in MSE? S.J.T.U. Phase Transformation and Applications Materials Science and Engineering Close relationship between properties and microstructure The role of thermodynamics in MSE? SJTU Thermodynamics of Materials Spring2006©X.J.Jin Introduction
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2006 © X. J. Jin Introduction The role of thermodynamics in MSE? Materials Science and Engineering Close relationship between properties and microstructure The role of thermodynamics in MSE?
Thermodynamics S.J.T.U. Phase Transformation and Applications Dictionary interpretation (Merriam-Webster) 1:physics that deals with the mechanical action or relations of heat 2:thermodynamic processes and phenomena Britannica Systematic study of the relationship between heat,work. temperature,and energy,now encompassing the general behaviour of physical systems in a condition of equilibrium or close to it.It is a fundamental part of all the physical sciences SJTU Thermodynamics of Materials Spring 2006 X.J.Jin Introduction
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2006 © X. J. Jin Introduction Thermodynamics • Dictionary interpretation (Merriam-Webster) 1: physics that deals with the mechanical action or relations of heat 2: thermodynamic processes and phenomena Britannica Systematic study of the relationship between heat, work, temperature, and energy, now encompassing the general behaviour of physical systems in a condition of equilibrium or close to it. It is a fundamental part of all the physical sciences