[논문]Effect of Ti and Si Interlayer Materials on the Joining of SiC Ceramics

Jung, Yang-Il; Park, Jung-Hwan; Kim, Hyun-Gil; Park, Dong-Jun; Park, Jeong-Yong; Kim, Weon-Ju

doi:10.1016/j.net.2016.03.001

Effect of Ti and Si Interlayer Materials on the Joining of SiC Ceramics 원문보기

Nuclear engineering and technology : an international journal of the Korean Nuclear Society, v.48 no.4, 2016년, pp.1009 - 1014

Jung, Yang-Il (LWR Fuel Technology Division, Korea Atomic Energy Research Institute) , Park, Jung-Hwan (LWR Fuel Technology Division, Korea Atomic Energy Research Institute) , Kim, Hyun-Gil (LWR Fuel Technology Division, Korea Atomic Energy Research Institute) , Park, Dong-Jun (LWR Fuel Technology Division, Korea Atomic Energy Research Institute) , Park, Jeong-Yong (LWR Fuel Technology Division, Korea Atomic Energy Research Institute) , Kim, Weon-Ju (LWR Fuel Technology Division, Korea Atomic Energy Research Institute)

Abstract ▼ AI-Helper

SiC-based ceramic composites are currently being considered for use in fuel cladding tubes in light-water reactors. The joining of SiC ceramics in a hermetic seal is required for the development of ceramic-based fuel cladding tubes. In this study, SiC monoliths were diffusion bonded using a Ti foil interlayer and additional Si powder. In the joining process, a very low uniaxial pressure of ~0.1 MPa was applied, so the process is applicable for joining thin-walled long tubes. The joining strength depended strongly on the type of SiC material. Reaction-bonded SiC (RB-SiC) showed a higher joining strength than sintered SiC because the diffusion reaction of Si was promoted in the former. The joining strength of sintered SiC was increased by the addition of Si at the Ti interlayer to play the role of the free Si in RB-SiC. The maximum joint strength obtained under torsional stress was ~100 MPa. The joint interface consisted of $TiSi_2$, $Ti_3SiC_2$, and SiC phases formed by a diffusion reaction of Ti and Si.

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제안 방법

7, to identify the phase. The analysis was conducted on the fracture surface revealing the joining interface. There were more than three phases.
1. The specimen was designed to be tested by a torsion test to evaluate the joining strength. The specimen was hexagonal in shape and contained a drilled ring-type joining area.

대상 데이터

As interlayer materials, a commercially available pure titanium foil (50 mm in thickness, Alfa Aesar, USA) and pure silicon powder (<<44 mm in particle size, Alfa Aesar) were prepared.
The samples were mounted in a polyurethane resin, and then manually polished using a series of abrasive papers containing diamond particles.

이론/모형

To evaluate the joining strength, a torsion test was performed according to ASTM F1362 (Standard Test Method for Shear Strength and Shear Modulus of Aerospace Glazing Interlayer Materials). A torsion test using ring-type samples was recommended to produce the most reliable test results for SiC-to-SiC joints [20,23].

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Effect of Ti and Si Interlayer Materials on the Joining of SiC Ceramics 원문보기

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Effect of Ti and Si Interlayer Materials on the Joining of SiC Ceramics 원문보기

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