4635
This led to the formation of an intermediate dilution zone characterized by substantial mixing between IN625 superalloy substrate and NiCrAlY bond coat suggesting excellent metallurgical bonding .
 application: led; concept or principle: mixing; material: substrate; application: bond coat; concept or principle: metallurgical bonding
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: led, mixing, substrate, bond coat, metallurgical bonding 
Answer:
 application: led; concept or principle: mixing; material: substrate; application: bond coat; concept or principle: metallurgical bonding