2949
High temperature ( 500 °C ) pin-on-disc tests were conducted to investigate the effect of carbides phase fraction on friction and wear .
 process parameter: temperature; material: carbides; concept or principle: fraction; concept or principle: friction; concept or principle: wear
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: temperature, carbides, fraction, friction, wear 
Answer:
 process parameter: temperature; material: carbides; concept or principle: fraction; concept or principle: friction; concept or principle: wear