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The thermal properties were almost unchanged , and the hardness and elastic modulus of the Ni-based metallic glass were improved compared with the original material .
 concept or principle: thermal properties; machanical property: hardness; machanical property: elastic modulus; material: metallic glass; material: material
Please list all entity words in the text that fit the category.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} 
Answer:
 concept or principle: thermal properties; machanical property: hardness; machanical property: elastic modulus; material: metallic glass; material: material