Textile preforms for tungsten fibre-reinforced composites
Textile preforms for tungsten fibre-reinforced composites
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用于钨纤维增强复合材料的纺织预成型件
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
R. Neu
中科院分区：
文献类型：
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作者：
H. Gietl;A. Müller;J. Coenen;M. Decius;D. Ewert;T. Höschen;P. Huber;M. Milwich;Johann Riesch;R. Neu
要求高热通量的应用，例如未来核聚变装置的面向等离子体的组件，需要开发先进材料。对于此类组件，铜合金目前被视为散热器材料，而单片钨则被视为直接面向等离子体的材料。然而，这些材料在一个组件中的组合是有问题的，因为它们表现出不同的热机械特性并且它们的最佳工作温度不重叠。在这方面，可以通过应用利用拉制钨纤维作为增强材料的复合材料来实现改进。对于这些复合材料的制造过程，需要合适的钨纤维预制棒生产方法。在下文中，我们将通过有关平面编织（丝距为 90–271 µm）、圆形编织（编织角度为 60° 和 12° 的多层编织）以及复丝纱线（15 根钨丝， 16 μm 直径）被提出。利用这些不同的纺织预成型件，生产出了密度超过 99% 的钨纤维增强钨 (W f /W) 和无孔钨纤维增强铜 W f /Cu 复合材料，这证明了它们在复合材料生产工艺中的适用性。
Demanding high heat flux applications, as for example plasma-facing components of future nuclear fusion devices, ask for the development of advanced materials. For such components, copper alloys are currently regarded as heat sink materials while monolithic tungsten is foreseen as directly plasma-facing material. However, the combination of these materials in one component is problematic since they exhibit different thermomechanical characteristics and their optimum operating temperatures do not overlap. In this context, an improvement can be achieved by applying composite materials that make use of drawn tungsten fibres as reinforcement. For the manufacturing processes of these composites, suitable tungsten fibre preform production methods are needed. In the following, we will show that tungsten fibres can be processed to suitable preforms by means of well-established textile techniques as studies regarding the production of planar weavings (wire distances of 90–271 µm), circular braidings (multilayered braidings with braiding angle of 60° and 12°) as well as multifilamentary yarns (15 tungsten filaments with 16 µm diameter) are presented. With such different textile preforms tungsten fibre-reinforced tungsten (W f /W) with a density of over 99% and pore-free tungsten fibre-reinforced copper W f /Cu composites were produced which proves their applicability with respect to a composite material production processes.