Study of Causes of Destruction of Materials Obtained by the Cold Gas-Dynamic Spraying during Their Operation in a Vacuum

IF 0.3 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Inorganic Materials: Applied Research Pub Date : 2025-07-15 DOI:10.1134/S207511332570056X

K. A. Frolov, A. A. Stepnov, I. V. Belyaev, V. E. Bazhenov, P. S. Mogilnikov

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Abstract

This article studies the causes of destruction of materials applied by cold gas-dynamic spraying (CGDS) to the surface of products operating in a vacuum. A-20-11 material, which is a mechanical mixture of aluminum, zinc, and corundum powders, was chosen for the experiments. Methods of X-ray computed tomography, scanning electron microscopy, and thermogravimetry, as well as method of determination of gases in metals, were used in the work. It is shown that materials obtained by CGDS method have no open porosity. Heating the carrier gas to 400°C does not lead to fusion of the coating material. It was found that it contains of hydrogen and oxygen, which are apparently located on the surface of sprayed material particles (aluminum, zinc, and corundum powders) in the form of adsorbed moisture. Heating the coating material leads to its evaporation. Expansion of resulting steam is the most likely cause of coating failure. The results obtained were used to improve the technology of applying CGDS coatings to the surface of products operating in a vacuum.

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真空冷气动态喷涂材料破坏原因的研究

本文研究了在真空条件下对产品表面进行冷气动力喷涂（CGDS）对材料破坏的原因。实验选用a -20-11材料，它是铝、锌和刚玉粉末的机械混合物。工作中使用了x射线计算机断层扫描、扫描电子显微镜、热重法以及测定金属中气体含量的方法。结果表明，采用CGDS法制备的材料无开孔现象。将载气加热到400℃不会导致涂层材料的熔合。发现它含有氢和氧，它们明显以吸附水分的形式存在于喷射材料颗粒（铝、锌和刚玉粉末）的表面。加热涂层材料导致其蒸发。产生的蒸汽膨胀是最可能导致涂层失效的原因。所得结果用于改进真空操作下产品表面CGDS涂层的工艺。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Inorganic Materials: Applied Research Engineering-Engineering (all)

CiteScore

0.90

自引率

0.00%

发文量

199

期刊介绍： Inorganic Materials: Applied Research contains translations of research articles devoted to applied aspects of inorganic materials. Best articles are selected from four Russian periodicals: Materialovedenie, Perspektivnye Materialy, Fizika i Khimiya Obrabotki Materialov, and Voprosy Materialovedeniya and translated into English. The journal reports recent achievements in materials science: physical and chemical bases of materials science; effects of synergism in composite materials; computer simulations; creation of new materials (including carbon-based materials and ceramics, semiconductors, superconductors, composite materials, polymers, materials for nuclear engineering, materials for aircraft and space engineering, materials for quantum electronics, materials for electronics and optoelectronics, materials for nuclear and thermonuclear power engineering, radiation-hardened materials, materials for use in medicine, etc.); analytical techniques; structure–property relationships; nanostructures and nanotechnologies; advanced technologies; use of hydrogen in structural materials; and economic and environmental issues. The journal also considers engineering issues of materials processing with plasma, high-gradient crystallization, laser technology, and ultrasonic technology. Currently the journal does not accept direct submissions, but submissions to one of the source journals is possible.