Effect of annealing on the phase composition of the sealing coatings based on APC (aluminophosphate compound)

V. I. Bol'shakov, S. I. Veselova, A. B. Zagorodniy

Abstract


Raising of problem. Studying by the X-ray method the composition of the sealing coatings based on aluminophosphates and the effect of annealing on its phase composition. Methodology. The X-ray studies of the phase composition of the sealing coatings based on APC (aluminophosphate compounds) and the effect of annealing on its phase composition were carried out. The roentgenograms for structural analysis were obtained on a DRON-4-07 diffractometer  using the filtered copper radiation on the secondary beam. Registration of diffraction patterns and primary processing were carried out  using the complex PDOS software  with display the diffraction patterns on the screen. Using the “loop” option allowed to identify the  weak interferential lines,  which enhanced the accuracy of  high-quality X-ray diffraction method.  Results. It is found that the base coating is  X-ray amorphous phase and  the annealing does not significantly affect on the phase composition of  crystal’s phases. The boundary of the annealing temperature for the coating is defined. Scientific novelty. Scientific novelty consists in obtaining the coverage based on APC by plasma spraying method, studying of its composition and usability to increase the efficiency ratio of the compressor the  gas turbine engine. Practical significance. By designing a compressor of gas turbine engine (GTE) it tends to create the smallest possible radial and axial clearances between the rotor and the stator, which prevents the flow of gases from an area of higher pressure to lower pressure.  Gap dimensions significantly affect the features of compressor as a whole, such as compressor efficiency ratio, engine thrust and fuel unit consumption. To ensure the operability of sealing with minimum or even zero clearance the compressor housing should have a special soft and easily burned-in  coating which is applied to it’s  inner surface. Compressor blades in the course of its work, cut the grooves when touching the cover without causing the locking and destruction of the rotor. Therefore, the development of new compounds of sealing coatings which ensure the reliable operation of the GTE compressor are highly relevant.


Keywords


X-ray analysis of the phase composition; coating obtained by plasma spraying; the effect of annealing on phase composition; gas turbine engine

References


Бритун В. Ф. Мартенситные превращения в углероде и нитриде бора /В. Ф. Бритун, А. В. Курдюмов // Сверхтвердые материалы. Получение, структура, свойства. – 2001. – № 2. – С. 3–14.

Britun V.F., and Kurdyumov A.V. Martensitnye prevrashcheniya v uglerode i nitride bora. [Martensitic transformation in carbon and boron nitride]. Sverhtverdye materialy. Poluchenie, struktura, svojstva [Superhard materials. Preparation, structure and properties]. 2001, no. 2, pp. 3−14. (in Russian).

Бромберг А. В. Алюмохромфосфатное связующее / А. В. Бромберг,

А. Г. Касаткина, В. А. Копейкин и др. // Неорганические материалы. − 1969. − № 4. − С. 1566−1572.

Bromberg A.V., Kasatkina A.G., Kopejkin V.A. and etc. Alyumohromfosfatnoe svyazuyushchee [Alyumohromfosfatic connective]. Неорганические материалы [Inogranic materials]. 1969, no. 4, pp. 1566−1572. (in Russian).

Верещагин В. И. Покрытия на основе фосфатных связующих /

В. И. Верещагин, Вас. В. Гузеев, Вит. В. Гузеев // Стекло и керамика. − 2000. − № 6. − С. 28−29.

Vereshchagin V.I., Guzeev Vas.V. and Guzeev Vit.V. Pokrytiya na osnove fosfatnyh svyazuyushchih [Coatings based phosphate binders]. Steklo i keramika [Glass and keramika]. 2000, no. 6, pp. 28−29. (in Russian).

Г. Реми. Курс неорганической химии / Г. Реми. − Москва : Изд. иностр. лит., 1963.

G. Remi. Kurs neorganicheskoj himii [Course of inorganic chemistry]. Moscow : Foreign Lit. Publ., 1963. (in Russian).

Верещагин В. И. Покрытия на основе фосфатных связующих /

В. И. Верещагин, Вас. В. Гузеев, Вит. В. Гузеев // Стекло и керамика. − 2000. − № 6. − C. 17−19.

Vereshchagin V.I., Guzeev Vas.V. and Guzeev Vit.V. Pokrytiya na osnove fosfatnyh svyazuyushchih [Coatings based phosphate binders]. Steklo i keramika [Glass and keramika]. 2000, no. 6, pp. 17−19. (in Russian).

Гузеев В. В. Защитные покрытия на основе фосфатных связующих / В. В. Гузеев, Т. Н. Гузеева // Новые материалы и технологии на рубеже веков : матер. V междунар. науч.-техн. конф. − Пенза, 2000. − С. 47.

Guzeev V.V. and Guzeeva T.N. Zashchitnye pokrytiya na osnove fosfatnyh svyazuyushchih. [Protective coatings based phosphate binders]. Novye materialy i tekhnologii na rubezhe vekov : mater V mezhdunar. nauch.-tekhnich. konf. [New materials and technologies in the turn of the century : materials of V-th international scientific-technical conference]. Penza, 2000, pp. 47. (in Russian).

Загородний А. Б. Рентгенофазовый анализ защитного покрытия на основе полифосфатов, полученного плазменным напылением / А. Б. Загородний, В. И. Журавель, В. Н. Волчук, С. И. Веселова, А. В. Лясота, В. И. Любушкин // Строительство, материаловедение, машиностроение. − 2012. − Вып. 64. − С. 315−318.

Zagorodnij A.B., Zhuravel' V.I., Volchuk V.N., Veselova S.I., Lyasota A.V. and Lyubushkin V.I. Rentgenofazovyj analiz zashchitnogo pokrytiya na osnove polifosfatov, poluchennogo plazmennym napyleniem [XRD analysis of protective coatings based on polyphosphates obtained by plasma spraying]. Stroitel'stvo, materialovedenie, mashinostroenie [Construction, Materials, Mechanical Engineering]. 2012, no. 64, pp. 31−318. (in Russian).

Огнеупорные растворы на фосфатных связующих / [В. А. Копейкин, В. С. Климентьева, Б. Л. Красный]. − Москва : Металлургия, 1986. − 102 c.

Kopejkin V.A., Kliment'eva V.S. and Krasnyj B.L. Ogneupornye rastvory na fosfatnyh svyazuyushchih. [Refractory solutions on phosphate binders]. Moscow : Metallurgy Publ., 1986, 102 p. (in Russian).

Копейкин В. А. Образование аморфной фазы при цементации материалов на основе алюмофосфатного связующего / В. А. Копейкин, А. И. Кудряшова, Л. Н. Кузьминская, И. Л. Рашкован, И. В. Танаев // Неорганические материалы. − 1967. − Т. 111. − № 4. − С. 737−739.

Kopejkin V.A., Kudryashova A.I., Kuz'minskaya L.N., Rashkovan I. L. and Tanaev I.V. Obrazovanie amorfnoj fazy pri cementacii materialov na osnove alyumosfatnogo svyazuyushchego [The formation of the amorphous phase during cementation materials based alyumosfatnogo binder]. Neorganicheskie materialy [Inorganic materials]. 1967, vol. 111, no. 4, pp. 737−739. (in Russian).

Петьков В. И. / В. И. Петьков, Г. И. Дорохова, А. И. Орлова // Кристаллография. − 2001. − Т. 46. − № 1. − С. 76−81.

Pet'kov V.I., Dorohova G.I. and Orlova A.I. Kristallografiya [Kristallografiya]. 2001, vol. 46, no. 1, pp. 76−81. (in Russian).

Рашкован И. Л. К вопросу о термических превращениях алюмофосфатного связующего / И. Л. Рашкован, В. А. Копейкин и др. // Неорганические материалы. − 1966. − Т. 3. − № 2. − С. 541−549.

Rashkovan I.L., Kopejkin V.A. and etc. K voprosu o termicheskih prevrashcheniyah alyumofosfatnogo svyazuyushchego [On the issue of thermal transformations of the binder aluminophosphate]. Neorganicheskie materialy [Inorganic materials]. 1966, vol. 3, no. 2,

pp. 541−549. (in Russian).

Рашкован И. Л. Образование аморфной фазы при цементации материалов на основе алюмофосфатного связующего / И. Л. Рашкован, В. А. Копейкин и др. // Неорганические материалы. − 1967. − T. 3. − № 4. − С. 737−739.

Rashkovan I.L., Kopejkin V.A. and etc. Obrazovanie amorfnoj fazy pri cementacii materialov na osnove alyumofosfatnogo svyazuyushchego [The formation of the amorphous phase during cementation materials based on aluminophosphate inorganic binder materials]. Neorganicheskie materialy [Inorganic materials]. 1967, vol. 3, no. 4, pp. 737−739. (in Russian).

Dachuan Chen, Liping He and Shouping Shang. Study on aluminum phosphate binder and related Al2O3-Si ceramic coating. J. Mater. Sci. and Eng., A 348, 2003, pp. 29−35. (in English).


GOST Style Citations