A Study on the joining of $Al_2$$O_3$ to STS304 with using Cu-Ti Insert metal

Cu-Ti삽입금속을 이용한 $Al_2$$O_3$-STS304접합체 계면조직에 관한 연구

  • Kim, Byeong-Mu (Dept.of Metallurgical Engineering, Busan National University) ;
  • Sin, Sun-Beom (Dept.of Metallurgical Engineering, Busan National University) ;
  • Gang, Jeong-Yun (Dept.of Metallurgical Engineering, Busan National University) ;
  • Lee, Sang-Rae (Dept.of Metallurgical Engineering, Busan National University)
  • Published : 1993.02.01

Abstract

Abstract The increasing application of $Al_2$,$O_3$ and related ceramics as engineering materials is because of their attractive properties of fine ceramics. One solution to the wide variety of ceramic to metal combination lies in the effective joining. Active metal brazing of $Al_2$,$O_3$, to STS304 was investigated using Cu -Ti alloys. Titanium additive is chosen since it is good oxide former~. Brazing is performed under vacuum($10^{-3}$-$10^{-4}$ torr), a temperature between 1100 and 120$0^{\circ}C$ and time of 0.5-1.5hr. The microstructure of the brazed joints of $Al_2$,$O_3$ to STS304 with Cu-Ti insert metals were examined by using optical microscope and SEM and reaction products were analyzed by using EDX, WDX and XRD. Also interfacial reactions occuring during the brazing of $Al_2$,$O_3$/Cu-Ti/STS304 system are discussed. Experimental results showed formation of Titanium oxide T$i_2$$O_3$ which is attributable to the joining $Al_2$,$O_3$ to STS304 with Cu-Ti insert metal.

세라믹스를 공업분야에 응용범위를 확대하기 위한 최선의 수단으로 금속과의 복합화를 들수 있다. 금속과 복합화하는 방법중에서 세라믹스/금속접합은 부품의 제조등에 이용될 수 있는 수단으로 많은 연구가 행하여져서 이미 몇몇 부품에 대해서는 실용화가 되고 있고 현재에도 활발히 연구가 되고 있다. 따라서 본 연구에서는 여러가지 접합법중에서도 비교적 공정이 간편한 활성 브레이징법을 이용해 $Al_2$$O_3$ 와 304 스테인레스강을 접합하였으며 이때 삽입금속으로는 Cu-Ti합금을 사용하였고 접합온도 및 접합시간 범위는 각각 110$0^{\circ}C$-120$0^{\circ}C$, 0.5h-1.5h, 그리고 브레이징로 내의 분위기는 $10^{-3}$-$10^{-4}$ torr로 유지하였다. 접합후 접합부 조직에 대한 접합조건의 영향을 검토하고 반응생성물을 EDX, WDX 및 XRD을 이용해 분석하였으며 반응층형성을 위한 계면화학반응을 고찰하였다. 그 결과 알루미나와 삽입금속의 계면에서 접합을 유도하는 반응층은 T$i_2$$O_3$임을 확인할 수 있었다.

Keywords

References

  1. 21世紀への新素材フアインセラミシクス 通産省生産業局(編)
  2. Weld. J. v.10 Joining Tantalum to Alumina by Brazing D.Douglas Berger
  3. Trans. Brit. Ceram. Soc. v.59 no.12 The Metallizing if High-Al₂O₃ Ceramics Deuton,E.P.;Rawson,H.
  4. J. Mater. Sci. v.10 High-Temperature Metallizing part 1 Twentymen,M.E.
  5. Philips Tech. Rev. v.35 no.718 Ceramic-to-Metal Bonding with Sputtering as a Metallizing Technique Bronnes,R.L.(et al.)
  6. 日本鎔接學會資料 西本和俊
  7. Br. Cream. Trans. J. Active metal Brazing M.G.Nicholas
  8. Ph.D Thesis Kook-Soo Bang
  9. Mater. Sci. Technol. Ceramic/Metal Joing for Structural applications Nicholas,M.G.;Mortimer,D.A.
  10. Metallurgical Thermochemistry(5th Edition) Kubaschewski,O.;Alocock,C.B.
  11. MLM-3431(OP), DE87-009195, Dept. of Energy Cont. DE-ACOE-76 DP00053, Monsanto Res. Corp. Bonding and Fracture of Titanium-Containing Braze Alloys to Alumina Cassidy,R.T.(et al)
  12. 鎔接學會論文集 v.4 no.2 アモルフアスCu-Ti合金ろうによるアルミナと銅の接合 奈賀;淺見;岡本
  13. 鎔接學會論文集 v.7 no.1 Ti-Zr基ろう用いた超高純度アルミナチタンのとろう付性 恩澤;鈴村
  14. 日本接着協會誌 v.22 no.3 Joining Technology of Ceramics and the Interfaces Takshio,H.