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首页> 外文期刊>Steel in Translation >Mechanical Properties of High-Temperature Composites Made from Mixtures of Tungsten-Coated and Uncoated NiAl Intermetallide Granules
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Mechanical Properties of High-Temperature Composites Made from Mixtures of Tungsten-Coated and Uncoated NiAl Intermetallide Granules

机译：钨包覆和未包覆的NiAl金属间化物颗粒混合物制成的高温复合材料的力学性能

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摘要

An interesting possibility is the production of high-temperature composites with a honeycomb structure by sintering powder based on NiAl (or simple alloys based on NiAl) when each grain is coated with a thin layer of tungsten or successive layers of tungsten and molybdenum [1]. We may note the following research findings: —nonuniform thickness of the tungsten coating on an individual grain (in the limiting case, no coating on a section of the grain's surface); —rupture of the coating in technological processes associated with deformation; —breakdown of the continuous tungsten film to individual droplets, in the form of a tungsten alloy with Ni and Al, formed at temperatures near the melting point of NiAl [2]. These processes may convert the composite from a material with a honeycomb structure to a dispersely hardened material. In the present work, we attempt to determine what proportion of grains with intact coatings is sufficient for the composite with an initial honeycomb structure to retain its high strength (within the spread of mechanical test data).
机译：一个有趣的可能性是，当每个晶粒都覆盖一层钨薄层或连续的钨和钼层时，通过烧结基于NiAl的粉末（或基于NiAl的简单合金）来生产具有蜂窝状结构的高温复合材料[1]。 。我们可能会注意到以下研究发现：—单个晶粒上钨涂层的厚度不均匀（在极限情况下，晶粒表面的一部分上没有涂层）; -与变形有关的工艺过程中涂层的破裂; -在接近NiAl熔点的温度下，将连续的钨膜分解为具有Ni和Al的钨合金形式的单个液滴[2]。这些过程可将复合材料从具有蜂窝结构的材料转变为分散硬化的材料。在目前的工作中，我们试图确定具有完整涂层的颗粒比例足以使具有初始蜂窝结构的复合材料保持其高强度（在机械测试数据的范围内）。

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