8063
X-ray diffraction , scanning electron microscopy , and differential thermal analysis were used to characterize the structural evolution of the powder feedstock during an infiltration heating cycle .
 process characterization: X-ray diffraction; process characterization: scanning electron microscopy; process characterization: thermal analysis; concept or principle: evolution; machine or equipment: powder feedstock; concept or principle: infiltration; manufacturing process: heating
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: 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} 
 Entities: X-ray diffraction, scanning electron microscopy, thermal analysis, evolution, powder feedstock, infiltration, heating 
Answer:
 process characterization: X-ray diffraction; process characterization: scanning electron microscopy; process characterization: thermal analysis; concept or principle: evolution; machine or equipment: powder feedstock; concept or principle: infiltration; manufacturing process: heating