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Terms in this set (22)
uses visible light to illuminate the object
dissection microscope/ stereo microscope
theuses two lens systems to give a stereoscopic image
appears to be 3 dimensinal
specialized type of compound light microscope for viewing polished metal specimens
uses laser light of scan across the specimen with the aid of the scanning mirror. Produces thin optical sections out of thick specimens
Scanning Electron microsscope
SEM - uses electrons to create an image which is displayed on monitor. Nonconductive specimens are coated witha conductive material such as gold so they can imaged.
transmission electron microscope (TEM)
uses electrons to pass through the specimen. requires extension specimen preparation.
Scanning Probe Miscoropes
Atomic Form Microscopy, and Scanning tunneling miscroscopes (STM)
used to stufy surface features by moving a sharp probe over the object surface
AFM enable the user to image the topography of a sample and monitor ultrasonic surface virbrations
coordinate measuring machines
object's resistance to acceleration
brinell hardness testing
bulk hardness test of heavy sections of softer steel and metals. large deformation , more doncuvice to testing porous material.
Small samples cannot be tested
uses two loads. first load to eliminate surface imperfections.
superficial rockwell hardness testing
hard thin material
square based pyramid is used
small load - surface test
knoops hardness test
used for small, thin samples.
Uses skinny diamond
dynamic hardness test that uses materials absoprtion factor and measures the elastic resistance to penetration. No pentration is made
must be smooth, flat, surface
sondur hardness test
on frequency of metal as basis of measurement
Mohs Hardness test
First hardness test - scratch test
light waves to measure surface
polished transparent material used for interferometery
measure the amount of light reflected by a surface as a function of wavelength,
characterize the light spectrum of a chemical, dissolved in a liquid by measuring the concentration of light absoprtion.
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