SU1247731A1 - Method of quantitative estimation of efficiency of barrier coatings on surface of carbonic fibres - Google Patents

Method of quantitative estimation of efficiency of barrier coatings on surface of carbonic fibres Download PDF

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Publication number
SU1247731A1
SU1247731A1 SU853857717A SU3857717A SU1247731A1 SU 1247731 A1 SU1247731 A1 SU 1247731A1 SU 853857717 A SU853857717 A SU 853857717A SU 3857717 A SU3857717 A SU 3857717A SU 1247731 A1 SU1247731 A1 SU 1247731A1
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USSR - Soviet Union
Prior art keywords
fibers
barrier coatings
coatings
barrier
internal friction
Prior art date
Application number
SU853857717A
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Russian (ru)
Inventor
Александр Георгиевич Москаленко
Лидия Яковлевна Сулаева
Леонид Иванович Бубнов
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Воронежский Политехнический Институт
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Publication of SU1247731A1 publication Critical patent/SU1247731A1/en

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Abstract

Изобретение относитс  к способам оценки эффективности барьерных;покрытий на волокнах. Цель изобретени  - повьппение точности определени  эффективности барьерных покрытий. По спо- .собу измер ют внутреннее трение на двух типах волокон - с покрытием и без него. Оба типа волокон подвергают высокотемпературному окислению при пониженном давлении и измер ют внутреннее трение в волокнах. 1 табл. (Л ю фа ОЭThe invention relates to methods for evaluating the effectiveness of barrier coatings on fibers. The purpose of the invention is to increase the accuracy of determining the effectiveness of barrier coatings. By the way, internal friction is measured on two types of fibers - coated and non-coated. Both types of fibers are subjected to high temperature oxidation under reduced pressure, and the internal friction in the fibers is measured. 1 tab. (Lu fa oe

Description

Изобретение относитс  к контролю и управлению технологией создани  композиционных материалов, в частности дл  контрол  качества армирующих материалов, используемых при НИИ металлов, керамики, сплавов и т.п. в виде углеродных волокон с защитными покрыти ми.;The invention relates to the control and management of the technology of creating composite materials, in particular for controlling the quality of reinforcing materials used in scientific research institutes of metals, ceramics, alloys, etc. in the form of carbon fibers with protective coatings .;

Цель предлагаемого способа - повышение точности определени  эффективности барьерных покрытий карбида кремни  на единичных углеродных/волокнах .The purpose of the proposed method is to improve the accuracy of determining the effectiveness of silicon carbide barrier coatings on single carbon / fibers.

Измер ют внутреннее трение в исходных углеродных волокнах (УВ) и в волокнах с барьерным покрытием из карбида кремни , прошедших отжиг в вакууме 10 Па в течение 30 мин.Internal friction is measured in the original carbon fibers (HC) and in fibers with a silicon carbide barrier coating, which has been annealed in a vacuum of 10 Pa for 30 minutes.

Предварительно осуществл ют измерение низкочастотного внутреннего трени  исходных УВ в вакууме - Ю Па затем вакуум понижаетс  до и осуществл ют отжиг волокон в ухудшенном вакууме при Т 1300 К в течение 30 мин. После отжига вакуум вновь повышают до исходного значени The low-frequency internal friction of the initial HC in vacuum — Yu Pa is preliminarily measured, then the vacuum is reduced to and the fibers are annealed in a degraded vacuum at T 1300 K for 30 minutes. After annealing, the vacuum is again increased to the initial value.

УВHC

56 1056 10

-e

1 УВ + (0,25%)1 HC + (0.25%)

31 1031 10

3 УВ + (2%)3 HC + (2%)

32 1032 10

,33

4 УВ + (5%)4 HC + (5%)

49 7 1049 7 10

,-з, w

2 УВ + (1%)2 HC + (1%)

19 1019 10

- J- j

Как следует из представленньрс результатов , наибольшее значение коэфAs follows from the presentation of the results, the largest value

и провод т повторное измерение внутреннего трени .and re-measuring internal friction.

Аналогичным образом провод т измерени  внутреннего трени  в УВ с барьерным покрытием.Similarly, measurements of internal friction in HC with barrier coating are carried out.

Пример. Способ использовали дл  анализа сплошности барьерных покрытий из карбида кремни  на УВ. Содержание карбида кремни  дл  трех различных покрытий составл ло 0,25, 1,2,5 вес.%. Измерение внутреннего .трени  проводили с помощью универсальной установки в вакуук1е 10 Па при 1300 К.Example. The method was used to analyze the continuity of silicon carbide barrier coatings on an HC. The content of silicon carbide for three different coatings was 0.25, 1.2.5 wt.%. The internal measurement of the diffraction was performed using a universal installation in a vacuum of 10 Pa at 1300 K.

Дл  испытаний из жгута УВ отбирали единичные волокна диаметром 7 10 м. Вазова  длина образцов составл ла м, что обеспечивало собственную частоту крутильных колебаний 1 Гц. Крепление образцов осзтцествл лось клеем на основе фенол- формальдегидной смолы.For testing, single fibers with a diameter of 7–10 m were selected from the HC bundle. The vase length of the samples was m, which ensured a natural frequency of torsional vibrations of 1 Hz. The fastening of the samples was sealed with a phenol-formaldehyde resin based adhesive.

Результаты измерений внутреннего трени  исходных УВ и волокон с барь- ерными покрыти ми карбида кремни  представлены в таблице.The results of measurements of the internal friction of the initial HC and fibers with silicon carbide barrier coatings are presented in the table.

110-- 10110-- 10

.-3.-3

0,980.98

58 1058 10

-3-3

0,930.93

0,050.05

48 1048 10

гзgz

0,160.16

0,840.84

58 1058 10

гзgz

0,140.14

0,860.86

55 -1055 -10

-3-3

0,650.65

0,340.34

фициента сплошности и будет  вл тьс  оптимальным дл  данных покрытий.consistency and will be optimal for these coatings.

312А77314312А77314

Claims (1)

Формула изобретени  покрытий карбида кремни  на единичных углеродных волокнах, измер ют вThe claims of silicon carbide coatings on single carbon fibers, measured in Способ количественной оценки эф- исходном волокне и волокнах с барь- фективности барьерных покрытий на .ерными покрыти ми внутреннее трение, поверхности углеродных волокон, осно- 5 чувствительное к деградации структу- ванный на их высокотемпературном ры волокна в процессе высокотемпера- окислении, отличающийс  турного окислени  при пониженном дав- тем, что, с цепью повышени  точности лении, и сопоставл ют скорости ее определени  эффективности барьерных относительного изменени .Method for quantitative evaluation of the effective fiber and fibers with barrier barrier coatings on non-conductive coatings internal friction, surfaces of carbon fibers, mainly sensitive to degradation, structured on their high-temperature rye fibers during high-temperature oxidation, differ- ent oxidation under reduced pressure, with a chain of increased precision, and compares the speed of its determination of the effectiveness of barrier relative change.
SU853857717A 1985-02-08 1985-02-08 Method of quantitative estimation of efficiency of barrier coatings on surface of carbonic fibres SU1247731A1 (en)

Priority Applications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107345883A (en) * 2017-02-22 2017-11-14 浙江科技学院(浙江中德科技促进中心) Ludox reinforces the intensive analysis device and method of a wide range of sand

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Гиммельфарб А.Ф., Шварцман С.Л. Современные методы контрол композиционных материалов. М.: Металлурги , 1979, 248. Килин B.C., Чередник Е.М., Щеглова Л.Н., Островский B.C., Дергуно- ва B.C. Стойкость против окислени углеродных волокон с защитньми покрыти ми. - Порошкова металлурги . 1975, № 2 (146), 47-66. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107345883A (en) * 2017-02-22 2017-11-14 浙江科技学院(浙江中德科技促进中心) Ludox reinforces the intensive analysis device and method of a wide range of sand
CN107345883B (en) * 2017-02-22 2019-10-01 浙江科技学院(浙江中德科技促进中心) Silica solution reinforces the intensive analysis device and method of a wide range of sand

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