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Due to larger phase fraction of metal carbides and formation of a relatively stable oxide layer , Febal−x-C-Cr-Mo-V-Wx showed better high temperature ( 500 °C ) wear resistance than Febal-C-Cr-Mo-V. Neutron diffraction of powders and additively manufactured samples of Febal-C-Cr-Mo-V and Febal−x-C-Cr-Mo-V-Wx alloys showed weak scattering properties .
 concept or principle: phase fraction; material: metal carbides; material: oxide; process parameter: layer; process parameter: temperature; machanical property: wear resistance; process characterization: Neutron diffraction; material: powders; manufacturing process: additively manufactured; material: Febal-C-Cr-Mo-V; material: alloys; concept or principle: properties
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: phase fraction, metal carbides, oxide, layer, temperature, wear resistance, Neutron diffraction, powders, additively manufactured, Febal-C-Cr-Mo-V, alloys, properties 
Answer:
 concept or principle: phase fraction; material: metal carbides; material: oxide; process parameter: layer; process parameter: temperature; machanical property: wear resistance; process characterization: Neutron diffraction; material: powders; manufacturing process: additively manufactured; material: Febal-C-Cr-Mo-V; material: alloys; concept or principle: properties