7364
Additionally , the introduction of Co provided solid solution strengthening and precipitation hardening via dispersion of second-phase Al9Co2 with a coherent interfacial relationship with the Al matrix .
 material: Co; material: solid solution; manufacturing process: precipitation hardening; concept or principle: dispersion; material: Al
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: Co, solid solution, precipitation hardening, dispersion, Al 
Answer:
 material: Co; material: solid solution; manufacturing process: precipitation hardening; concept or principle: dispersion; material: Al