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S.A.P.材料(烧结铝合金),当用作核燃料包壳时,在燃料元件端封(Eudelosures)的加工上存在着一定的困难。常用的熔合焊接方法不适于S.A.P.材料,因为它所含有的气体很容易释放出来,此外,铝的氧化物趋于聚积,从而会降低接头在高温下的强度。核燃料元件要求接头致密而强固,并且焊接过程应该达到此工业上一般所要求的坚固度更高的标准。本文介绍了两种焊接技术。首先发展的是压力扩散接合法,接着在最近完成了电阻焊接法。未来的核燃料将会拥有用电阻法焊接的端封,它能满足先进的设计要求,同时在经济上也是合算的。
The S.A.P. material (sintered aluminum alloy), when used as a nuclear fuel cladding, presents certain difficulties in the processing of the fuel element end seals (Eudelosures). The commonly used fusion welding method is not suitable for S.A.P. materials since the gas contained therein is easily released and in addition, the aluminum oxide tends to accumulate, thereby reducing the strength of the joint under high temperatures. Nuclear fuel elements require joints that are dense and strong, and the welding process should meet the more robust standards generally required by the industry. This article describes two welding techniques. The first is the development of pressure diffusion bonding method, followed by the recent completion of the resistance welding method. Future nuclear fuel will have a resistance welded end seal that meets advanced design requirements and is economically cost-effective.