4575
In the first approach , direct deposition of Ti64 on SS410 substrate and compositionally graded bimetallic structures were attempted without any intermediate bond layer .
 concept or principle: deposition; material: Ti64; material: substrate; process parameter: layer
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: deposition, Ti64, substrate, layer 
Answer:
 concept or principle: deposition; material: Ti64; material: substrate; process parameter: layer