| Title |
Fabrication of Al / AlN Functional Gradient Materials by Direct Nitridation Method |
| Authors |
이경재(Kyung Jae Lee); 김재윤(Jae Yoon Kim); 장영섭(Young Seob Jang); 김석윤(Suk Yoon Kim); 김용석(Yong Seog Kim) |
| Abstract |
Al/AlN FGMs were fabricated by the direct nitridation of Al/AlN powder compact. The density of a compact presintered at 600℃ in argon atmosphere followed by the reaction in nitrogen atmosphere at 900℃ for 4hours was improved to 97% of theoretical density. The reaction product was consisted of a dense ceramic layer on its surface and a ceramic-Al metal mixed layer beneath the layer. The reaction layer thickness was affected by the processing variables including AlN content. Al powder size and Mg content. |