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Composition , phase constitution , microstructure and corrosion behavior of the graded material were characterized by laser-induced breakdown spectroscopy ( LIBS ) , micro-beam X-ray diffraction ( XRD ) , scanning electron microscope ( SEM ) and high-throughput local electrochemical techniques respectively .
 concept or principle: Composition; concept or principle: phase; concept or principle: microstructure; machanical property: corrosion behavior; material: material; concept or principle: spectroscopy; process characterization: X-ray diffraction; process characterization: XRD; machine or equipment: scanning electron microscope; process characterization: SEM; concept or principle: electrochemical
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: Composition, phase, microstructure, corrosion behavior, material, spectroscopy, X-ray diffraction, XRD, scanning electron microscope, SEM, electrochemical 
Answer:
 concept or principle: Composition; concept or principle: phase; concept or principle: microstructure; machanical property: corrosion behavior; material: material; concept or principle: spectroscopy; process characterization: X-ray diffraction; process characterization: XRD; machine or equipment: scanning electron microscope; process characterization: SEM; concept or principle: electrochemical