6351
After printing , thermal processing at 230 °C resulted in crosslinking of the ePEEK components to form a stabilizing network throughout the specimen , which helped to preclude distortion and cracking upon sintering .
 components, distortion, cracking, sintering
Please list all entity words in the text that fit the category. Output format is "word1, 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} 
Answer:
 components, distortion, cracking, sintering