835
Scanning electron microscopy ( SEM ) , energy dispersive spectroscopy ( EDS ) , X-ray Diffraction ( XRD ) , Vickers microhardness and flash thermal diffusivity were used to characterize these bimetallic structures to validate our hypothesis .
 Scanning electron microscopy, SEM, energy dispersive spectroscopy, EDS, X-ray Diffraction, XRD, microhardness, flash, diffusivity
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 Scanning electron microscopy, SEM, energy dispersive spectroscopy, EDS, X-ray Diffraction, XRD, microhardness, flash, diffusivity