- 급속응고된 비정질 Zr-Be 합금 용가재를 이용한 Zircaloy-4의 브레이징 특성
- ㆍ 저자명
- 김상호,고진현,박춘호,김성규,Kim. Sang-Ho,Go. Jin-Hyeon,Park. Chun-Ho,Kim. Seong-Gyu
- ㆍ 간행물명
- 한국재료학회지
- ㆍ 권/호정보
- 2002년|12권 2호|pp.140-145 (6 pages)
- ㆍ 발행정보
- 한국재료학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
This study was conducted to investigate the brazing characteristics between Zircaloy-4 nuclear fuel cladding tubes and bearing pads with filler metals of amorphous $Zr_{1-x}Be_x$(0.3$leq$x$leq$0.5) binary alloy, in which they were produced in the ribbon form by the melt-spinning metod. The crystallization behavior, stability, hardness and micro-structure of brazed zone were examined by X-ray diffraction, differential scanning calorimetry, micro-Vickers hardness test, optical microscopy, and transmission electron microscopy. $Zr_{1-x}Be_x$(0.3$leq$x$leq$0.4) amorphous alloys were crystallized to $alpha$-Zr with increasing the temperature, and the rest were transformed to ZrBe$_2$at higher temperatures. On the other hand, $Zr_{1-x}Be_x$(0.4$leq$x$leq$0.5) amorphous alloys were crystallized to $alpha$-Zr and ZrBe$_2$, simultaneously. The thickness of the layer brazed with amorphous alloy was increased with increasing the beryllium content due to the higher diffusion of Be. The morphology of brazed layer with PVD Be filler metal showed dendrite while that brazed with amorphous alloys appeared globular. Micro-Vickers hardness of brazed zone increased as the beryllium content of filler metal was decreased.