烧结气氛对5Ni/（10Ni-NiFe_2O_4）金属陶瓷物相组成及力学性能的影响（英文）

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Bibliographic Details
Published in中国有色金属学报：英文版 Vol. 22; no. 1; pp. 124 - 128
Main Author 陈端 邹忠 田忠良 辛鹏飞 刘恺 赖延清 李劼
Format Journal Article
LanguageEnglish
Published 2012
Subjects
NiFe2O4
力学性能
烧结气氛
金属陶瓷
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Bibliography:43-1239/TG
nickel ferrite; cermet; mechanical property; sintering atmosphere
5Ni/（10NiO-NiFe2O4） cermet materials were prepared by cold pressing sintering method in different atmospheres. The phase compositions were studied by XRD, microstructure was studied by SEM and mechanical properties were studied by three-point-bending strength and heat cycle. The results show that Ni/（NiO-NiFe2O4） cermet can be obtained by sintering in vacuum or atmospheres with oxygen content of 2×10-5, 2×10-4 and 2×10-3, respectively, but the phase composition of the ceramics varies greatly with oxygen content of the sintering atmosphere. The cermet tends to have a high content of NiO when sintered in vacuum. The content of NiFe2O4 and Ni in the cermet materials respectively increases and decreases with increasing oxygen in the sintering atmosphere. In the vacuum, cermet has an average grain size of 3.90 μm and bending strength of 138.59 MPa, which is able to withstand thermal shock tests 6.67 times in average.
CHEN Duan, ZOU Zhong, TIAN Zhong-liang, XIN Peng-fei, LIU Kai, LAI Yan-qing, LI Jie School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China
ISSN:1003-6326