3818
Two exothermic phenomena were detected and associated with the Mg2Si precipitation and Si phase precipitation in the aB-printed alloy .
 material: Mg2Si; material: Si; concept or principle: phase; material: alloy
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: Mg2Si, Si, phase, alloy 
Answer:
 material: Mg2Si; material: Si; concept or principle: phase; material: alloy