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Гальванотехника и обработка поверхности №1 за 2019


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     Российское общество гальванотехников и специалистов в области обработки поверхности

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Раздел/SectionЭлектроосаждение металлов и сплавовElectroplating of metals and alloys
Заглавие/Title

О возможности получения термостойкого открытопористого пеноникеля электрохимическим способом

On the Formation of Nickel Form with Opened Porosity by Electrochemical Deposition

Авторы/AuthorsСалахова Р.К., Тихообразов А.Б.Salachova R.K., Tichoobrazov A.B.
Страницы/Pages13-20
Ключевые слова
Keywords
электроосаждение, пеноникель, металлизация пенополиуретана, electrodeposition nickel foam, metallization of polyurethane foam
Аннотация
Description
Представлена технологическая схема получения пеноникеля электрохимическим способом обработкой ретикулированного пенополиуретана, включающая подготовку диэлектрика под осаждение электропроводящего медного подслоя, химическое меднение, электролитическое никелирование и вытравливание пенополимера. Качественное выполнение технологических операций обеспечивает получение прогнозируемых физико-химических свойств пеноникеля: плотность не более 200 кг/м3; пористость не менее 85 %; размер пор 3-5 мм, термостойкость - до 650°С. Для оценки акустических свойств материала были изготовлены композитные звукопоглощающие конструкции (ЗПК)резонансного типа с пеноникелевым заполнителем. Проведены механические испытания пеноникеля, построена диаграмма сжатия пенометалла. Предложены возможные области применения пеноникеля в различных отраслях промышленности.The process for the preparation of nickel foam by the electrodeposition on polyurethane foam Polinazell treated in electroless copper bath for the deposition of conductive copper sublayer from the tartrate solution. Nickel was deposited from Watts bath. After depositing nickel polyurethane foam was dissolved in concentrated sulfuric acid. Physical and chemical properties of nickel foam were tested: its density not more than 200 kg /m3; porosity was not less than 85 % with pores 3-5 mm, heat resistance - up to 650°C (table 2). The appearance of nickel foam obtained is shown in Fig. 2. Metallographic study found that the thickness of the nickel coating was not more than 20 microns (Fig. 3), the thickness of copper sublayer is not more than 2 microns. Mechanical tests of nickel foam were carried out, the compression diagram of metal foam was obtained, similar in shape to the compression diagram of plastic materials (Fig. 4). Resonance-type composite sound-absorbing structures with a nickel foam filler were made (Fig. 1) in order to assess the acoustic properties of the material. They were investigated (Fig. 5). using Pulse Material Testing measuring complex by two - microphone method (transfer function method) at noise level up to 60 dB the absorption coefficients of WPC with perforated glass-and carbon fiber cladding in the frequency range from 16 to 6300 Hz Possible applications of this foam metal in various industries were considered on the basis of experimental data and analysis of physico-chemical, mechanical and special properties of the nickel foam. The process of obtaining of nickel foam on the basis of polyethers (Table 1), including the preparation of the dielectric under the deposition of the conductive sublayer of copper (etching, sensitization, activation Bespalova), thin-layer chemical copper plating in tartrate solution; electrolytic nickel plating in a Watt’s electrolyte and etching the foam in concentrated sulfuric acid was discribed. High-quality performance of the above mentioned technological operations ensures the predicted physical and chemical properties of the nickel foam: density not more than 200 kg/m3; porosity not less than 85 %; pore size 3-5 mm, heat resistance - up to 650°C (Table 2). The appearance of the nickel foam obtained by chemical-galvanic metallization of polyurethane foam is shown in figure 2. Metallographic study has found that the thickness of nickel coating was not more than 20 microns (figure 3), the thickness of the copper sublayer is not more than 2 microns. Mechanical tests of nickel foam were carried out, the compression diagram of the foam metal was obtained, similar in shape to the compression diagram of plastic materials (Fig. 4). Resonance-type composite were made in order to assess the acoustic properties of the material, sound-absorbing structures with a nickel foam filler (Fig. 1). The absorption coefficients of WPC with perforated glass-and carbon fiber cladding in the frequency range from 16 to 6300 Hz were investigated (Fig. 5).on the Pulse Material Testing measuring complex by two - microphone method (transfer function method) at noise level up to 60 dB. Possible applications of this foam metal in various industries were considered on the basis of experimental data and analysis of physico-chemical, mechanical and special properties.
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