4132
Functionally graded ( FG ) , thick TBCs ( > 3 mm ) consisting of Inconel 625 ( IN625 ) and yttria-partially stabilized zirconia ( 8YSZ ) were deposited on an A516 steel substrate via laser direct energy deposition ( LDED ) .
 Functionally graded, TBCs, mm, Inconel 625, zirconia, steel, laser, direct energy deposition
Please list all entity words in the text that fit the category. Output format is "word1, 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} 
Answer:
 Functionally graded, TBCs, mm, Inconel 625, zirconia, steel, laser, direct energy deposition