Creation of New Hard Ceramics UtilizingOccurrenceof a Specific Function in Chromium Oxynitride

2013 Fiscal Year Final Research Report

• Project/Area Number: 24750211
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Inorganic industrial materials
• Research Institution: Tomakomai National College of Technology
• Principal Investigator: ASAMI Hiroki 苫小牧工業高等専門学校, その他部局等, 助教 (00547961)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Keywords: 高硬度セラミックス / 酸窒化クロム / メカニカルアロイング / 放電プラズマ焼結

Research Abstract

The chromium oxynitride (Cr(N,O)) obtained by substitutional solid solution of oxygen into the chromium nitride (CrN) in which it is used as a tool coating mainly, the hardness is significantly improved regardless of covalent bonding also decrease has been found. In this study, we studied for manufacturing chromium magnesium oxynitride ((Cr, Mg) (N, O))ceramics as the creation of a new hard ceramic tool materials using the above properties.
The results of this study, (Cr,Mg)(N,O) powders have been successfully synthesized through the mechanical alloying under nitrogen atmosphere. In addition, We have also succeeded the preparation (Cr,Mg)(N,O) ceramics of substantially single phase. Furthermore, We have shown that (Cr,Mg)(N,O) ceramics has a high hardness above HV2000.