about smat materials

2. Smart materialsSmart materials
• Smart materials haveSmart materials have one orone or
more propertiesmore properties that can bethat can be
significantly altered in asignificantly altered in a
controlled fashion by externalcontrolled fashion by external
stimuli.stimuli.

3. THE EXTERNAL STIMULI’STHE EXTERNAL STIMULI’S
ARE:ARE:
• StressStress
• TemperatureTemperature
• MoistureMoisture
• pHpH
• Electric FieldElectric Field
• Magnetic Field.Magnetic Field.

4. EXAMPLES OFEXAMPLES OF SMARTSMART
MATERIALSMATERIALS
• Piezoelectric materials
• Shape memory alloys
• Magnetic shape memory
alloys

5. Piezoelectric materialsPiezoelectric materials

6. APPLICATIONSAPPLICATIONS
• Air bag sensorAir bag sensor
• BuzzerBuzzer
• Ultrasonic ImagingUltrasonic Imaging

7. Shape memory alloysShape memory alloys
• Shape memory alloys areShape memory alloys are
thermoresponsive materialsthermoresponsive materials
wherewhere deformation can bedeformation can be
induced and recoveredinduced and recovered
throughthrough temperature changestemperature changes ..

8. APPLICATIONSAPPLICATIONS
• Mending bones:
• Eye glass frames:

9. Magnetic SMAMagnetic SMA
• Magnetic Shape MemoryMagnetic Shape Memory
alloys are materials thatalloys are materials that
change their shapechange their shape inin
response to a significantresponse to a significant
change in the magnetic field.change in the magnetic field.

10. APPLICATIONSAPPLICATIONS