CaO掺杂Cu/(NiFe_2O_4-10NiO)金属陶瓷致密化及力学性能  

Study on the Densification and Mechanical Properties of Cu/(NiFe_2O_4-10NiO) Cermets Doped with CaO

作　　者：田忠良[1,2] 赖延清[1] 张刚[1] 李劼[1] 周科朝[2] 

机构地区：[1]中南大学材料科学与工程博士后流动站,长沙410083 [2]中南大学冶金科学与工程学院,长沙410083

出　　处：《矿产保护与利用》2010年第4期38-42,共5页Conservation and Utilization of Mineral Resources

基　　金：国家高技术发展研究计划项目(2008AA030503);国家重点基础研究发展规划项目(2005CB623703)

摘　　要：采用冷压—烧结技术制备了CaO掺杂的Cu/(NiFe2O4-10NiO)金属陶瓷,研究了掺杂CaO的不同金属相Cu含量的Cu/(NiFe2O4-10NiO)金属陶瓷相对密度及力学性能。试验结果表明:在1 200℃的烧结温度下,金属相含量为5%、10%和17%的2%CaO掺杂样品的相对密度分别为97.63%、96.10%和95.05%,比未掺杂CaO材料的相对密度提高约15%,且与未掺杂CaO材料在1 250℃烧结时所获试样致密度相接近。当材料致密度一致时,掺杂2%CaO对Cu/(NiFe2O4-10NiO)金属陶瓷的抗弯强度及抗热震性能的影响较小。Cu/（ NiFe2O4 -10NiO） cermets doped with CaO were fabricated by cold pressing -sin- tering, and their relative densities and mechanical properties were studied. The results showed that the relative densities of Cu/（ NiFe2O4 - 10NiO ） eermets containing Cu 5%, 10% and 17% , which were sintered at 1 200℃ and doped with 2% CaO （mass fractions）, were 97.63%, 96.10% and 95.05% respectively. Compared with the cermet of undoped with CaO at the same condition, the relative density of Cu/（ NiFe2O4 - 10NiO） cermet of doped CaO was improved about 15%, which was close to the cermet of undoped with CaO sintered at 1 250℃. The effect on the bending strength and thermal shock resistance of Cu/（ NiFe2O4 - lONiO） cermet doped with 2% CaO was less when their relative densities were near.

关 键 词：Cu/(NiFe2O4-10NiO)金属陶瓷 CaO掺杂 致密度 力学性能 铝电解 

分 类 号：TF125.42[冶金工程—粉末冶金] TG148[冶金工程—冶金物理化学]