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SLM manufacturing processibility of nickel based super alloy , powders related to the particle Size Distribution ( PSD ) , flow ability , mechanical properties and microstructures was investigated .
 manufacturing process: SLM manufacturing; material: nickel; material: super alloy; material: powders; concept or principle: particle Size Distribution; concept or principle: mechanical properties; material: microstructures
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: SLM manufacturing, nickel, super alloy, powders, particle Size Distribution, mechanical properties, microstructures 
Answer:
 manufacturing process: SLM manufacturing; material: nickel; material: super alloy; material: powders; concept or principle: particle Size Distribution; concept or principle: mechanical properties; material: microstructures