烧结气氛对17Ni/(10NiO-NiFe2O4)金属陶瓷物相组成及力学性能的影响

来源期刊:中南大学学报(自然科学版)2011年第4期

论文作者:刘风琴 田忠良 刘恺 陈端 赖延清 李劼

文章页码:884 - 887

关键词:NiFe2O4;金属陶瓷;力学性能;烧结气氛

Key words:NiFe2O4; cermet; mechanical property; sintering atmosphere

摘    要:采用冷压?烧结法在不同的烧结气氛下制备17Ni/(10NiO-NiFe2O4)金属陶瓷,并研究材料的物相组成、显微结构及力学性能。研究结果表明:在低真空及氧体积分数分别为2×10?5,2×10?4,2×10?3和1×10?2的气氛中均可获得17Ni/(10NiO-NiFe2O4)金属陶瓷,但气氛中氧体积分数对各组成物相的质量分数影响较大,在低氧体积分数时NiO含量相对较高,高氧质量分数时金属相质量分数相对较高;当烧结气氛中氧体积分数为2×10?4时,可获得晶粒尺寸为2.477 μm的17Ni/(10NiO-NiFe2O4)金属陶瓷,其抗弯强度可达116.55 MPa,在960 ℃下抗热震循环数可达7次,具有较好的力学性能。

Abstract:

17Ni/(10NiO-NiFe2O4) cermet materials were fabricated by cold pressing sintering method in different atmospheres, and their phase composition, microstructure and mechanical properties were also studied. The results show that 17Ni/(10NiO-NiFe2O4) cermet can be obtained by sintering in low vacuum or atmosphere with oxygen content (volume fraction) of 2×10?5,2×10?4,2×10?3 and 1×10?2, and the oxygen content affects on the phase composition of materials greatly. Cermet tends to have a high content of NiO sintered in atmosphere with low oxygen content, and a high content of metallic phase sintered in atmosphere with high content of oxygen. When the oxygen content of atmosphere amounts is 2×10?4, the grain size of 17Ni/(10NiO-NiFe2O4) cermet is 2.477 μm, and bending strength is 116.55 MPa, which can withstand 7 times of thermal shock tests at 960 ℃.

相关论文

  • 暂无!

相关知识点

  • 暂无!

有色金属在线官网  |   会议  |   在线投稿  |   购买纸书  |   科技图书馆

中南大学出版社 技术支持 版权声明   电话:0731-88830515 88830516   传真:0731-88710482   Email:administrator@cnnmol.com

互联网出版许可证:(署)网出证(京)字第342号   京ICP备17050991号-6      京公网安备11010802042557号