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The sintering behavior of Cu-Sn nanoparticles during welding process attributes to the formation of transition zone with homogenous microstructure , resulting to the improvement of hardness property and lap-shear strength of spot-welded joints .
 manufacturing process: sintering; material: Cu-Sn nanoparticles; manufacturing process: welding; concept or principle: process; concept or principle: transition; concept or principle: microstructure; machanical property: hardness; machanical property: lap-shear strength; machanical property: spot-welded joints
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: sintering, Cu-Sn nanoparticles, welding, process, transition, microstructure, hardness, lap-shear strength, spot-welded joints 
Answer:
 manufacturing process: sintering; material: Cu-Sn nanoparticles; manufacturing process: welding; concept or principle: process; concept or principle: transition; concept or principle: microstructure; machanical property: hardness; machanical property: lap-shear strength; machanical property: spot-welded joints