CAJ | 학술논문

为了改善17Ni-(10NiO-NiFe2O4)金属陶瓷惰性阳极中金属相的分布，在原料中添加不同含量的Co，以Co-Ni取代纯Ni作为金属相，采用真空烧结方法制备17(xCo-Ni)-(10NiO-NiFe 2 O 4)金属陶瓷，并研究Co添加量对金属陶瓷物相组成、显微组织、致密度及力学性能的影响。结果表明：烧结样品主要由Co-Ni、NiFe 2 O 4、NiO组成，部分Co与陶瓷基体反应生成CoO与Fe 2 O 3。添加适量Co可以改善金属相在陶瓷相的分布和形貌，使团聚孤立的金属相分布均匀，且部分球状金属相变为长条状金属相；同时，添加适量Co还可以促进烧结，提高试样的致密度。适量Co的添加还能降低晶粒尺寸，大幅提高金属陶瓷材料强度与韧性。当Co质量分数为金属相的20%时，金属陶瓷的综合性能最好，致密度、抗弯强度、断裂韧性及硬度分别达到96.87%、163.65 MPa、8.38 MPa/m1/2和820.81HV。
위료개선17Ni-(10NiO-NiFe2O4)금속도자타성양겁중금속상적분포，재원료중첨가불동함량적Co，이Co-Ni취대순Ni작위금속상，채용진공소결방법제비17(xCo-Ni)-(10NiO-NiFe 2 O 4)금속도자，병연구Co첨가량대금속도자물상조성、현미조직、치밀도급역학성능적영향。결과표명：소결양품주요유Co-Ni、NiFe 2 O 4、NiO조성，부분Co여도자기체반응생성CoO여Fe 2 O 3。첨가괄량Co가이개선금속상재도자상적분포화형모，사단취고립적금속상분포균균，차부분구상금속상변위장조상금속상；동시，첨가괄량Co환가이촉진소결，제고시양적치밀도。괄량Co적첨가환능강저정립척촌，대폭제고금속도자재료강도여인성。당Co질량분수위금속상적20%시，금속도자적종합성능최호，치밀도、항만강도、단렬인성급경도분별체도96.87%、163.65 MPa、8.38 MPa/m1/2화820.81HV。
In order to improve the distribution of metal phase in the 17Ni-(10NiO-NiFe2O4)cermet, 17(xCo-Ni)-(10NiO-NiFe2O4)cermet were prepared by vacuum sintering method using Co-Ni instead of Ni as the metal phase. And the effects of Co content on the phase composition, microstructure, relative density and mechanical properties of the cermet were investigated. The results show that the cermet is composed of Co-Ni, NiFe2O4and NiO, a part of Co reacts with ceramic matrix to form CoO and Fe2O3. The proper addition of Co can significantly improve the distribution and morphology of the metal phase, the agglomerate isolated metal phases can distribute uniformly and a part of spherical metal phases can change to elongated metal phases. Moreover, the proper addition of Co can promote sintering and increase the density of sample. Co addition can refine the grain size and greatly increase the strength and the toughness of cermet. When the mass fraction of Co in metal phase is 20%, the combination properties of sample are the best. The density, bending strength, fracture toughness and hardness are 96.87%, 163.65 MPa, 8.38 MPa/m1/2 and 820.81 HV, respectively.