Abstract

This paper presents the results of a study on impact of high-power heat load and tungsten (W) surface carbidization on its structural-phase composition and physical-mechanical properties. In this regard, carbidization of a W surface was carried out by means of beam-plasma discharge in a simulation machine with plasma-beam installation. Certain data were obtained regarding temperature in control points of studied samples and temperature distribution throughout the monoblock element, made as a rectangle with an orifice for a cooling path, placed in a fusion reactor divertor. The paper demonstrates that changes in heat load power have an impact on microhardness, roughness, atomization of the carbidized W surface, and phase formation processes. It was established that a heat load q = 10 MW/m² has very little effect on the elemental composition of the surface and structural-phase composition of W samples with a carbidized layer. Growth of thermal load up to q = 20 MW/m² leads to a noticeable transformation of tungsten monocarbide (WC) into tungsten semicarbide (W₂C) and cracking of the W sample surface.

摘要

本文介绍了有关高功率热负荷和钨（W）表面碳化对其结构相组成和物理机械性能的影响的研究结果。在这方面，在装有等离子束的模拟机中借助于束等离子放电进行W表面的碳化。获得了关于研究样品控制点的温度以及整个单元元件的温度分布的某些数据，该单元元件被制成带有冷却路径孔的矩形，放置在聚变反应堆分流器中。本文证明了热负荷功率的变化会影响显微硬度，粗糙度，碳化钨表面的雾化以及相形成过程。确定热负荷q = 10 MW / m ²对具有碳化层的W样品的表面元素组成和结构相组成影响很小。热负荷增长到q = 20 MW / m ²会导致单碳化钨（WC）明显转变为半碳化钨（W ₂ C）并导致W样品表面破裂。