CAJ | 학술논문

采用粉末冶金技术和高温固相烧结方法制备了1％TiO 2掺杂的17Ni/(10NiO-NiFe2 O 4)金属陶瓷材料,用 X 射线衍射仪分析了物相组成,用扫描电镜观察了微观组织,主要研究了 TiO 2对材料致密度和抗高温氧化性的影响.结果表明,1％的 TiO 2加入到材料后,未改变材料本身的结构,反而有利于降低材料内部颗粒的扩散激活能,使得扩散增快,提高材料的致密度,降低气孔率,使晶粒间的结合更紧密；此外,1％的 TiO 2还能提高材料的抗高温氧化性,氧化增重量在未掺杂材料的基础上降低了37．5％,约为15 mg/cm2；材料经960℃氧化12 h 后,氧化表面平整,氧化物颗粒结合紧密,且颗粒尺寸大小均一.
채용분말야금기술화고온고상소결방법제비료1％TiO 2참잡적17Ni/(10NiO-NiFe2 O 4)금속도자재료,용 X 사선연사의분석료물상조성,용소묘전경관찰료미관조직,주요연구료 TiO 2대재료치밀도화항고온양화성적영향.결과표명,1％적 TiO 2가입도재료후,미개변재료본신적결구,반이유리우강저재료내부과립적확산격활능,사득확산증쾌,제고재료적치밀도,강저기공솔,사정립간적결합경긴밀；차외,1％적 TiO 2환능제고재료적항고온양화성,양화증중량재미참잡재료적기출상강저료37．5％,약위15 mg/cm2；재료경960℃양화12 h 후,양화표면평정,양화물과립결합긴밀,차과립척촌대소균일.
Powder metallurgy technology and high temperature solid phase sintering method were used to prepare 17Ni/(10NiO-NiFe2 O 4 )cermet doped 1% TiO 2 .The phase composition was analyzed by X-ray diffractometer and microstructure was observed by scanning electron microscope.The influence of 1% TiO 2 to density and the high temperature oxidation resistance were studied mainly.The results reveal that TiO 2 does not change the structure of cermet.It was helpful to reduce activation energy of diffusion of molecule and accelerates diffusion. Moreover,it improves density which makes granular combine closely.In addition,it also can improve the high temperature oxidation resistance of cermet.After oxidation of 12 h at 960 ℃,the surface of cermet was flat,the oxide particles combine closely and particle size uniform.The increased weight after oxidation was 15 mg/cm2 which was 62.5% of undoped cermet.