Выдержка
TiC–NiCrBSi binder metal matrix composites are fabricated by self-propagating high-temperature synthesis (SHS) in reaction powder mixtures of titanium, carbon (carbon black), and NiCrBSi alloy. It is established that stable combustion in a steady-state mode is possible with the content of a thermally inert metal binder in reaction mixtures up to 50%. Porous SHS cakes are crushed easily for subsequent separation by screening the composite-powder fraction necessary for the coating deposition. The synthesis products are studied by optical and scanning electron microscopy, X-ray diffraction (XRD), and electron probe microanalysis (EPMA). It is found that the average size of carbide inclusions in the composite structure depends on the content of thermally inert alloy powder in reaction mixtures and can be intentionally controlled in a wide range. The microhardness of granules of the composite powder formed by crushing SHS cakes decreases monotonically with an increase in the content of the metal binder softer than titanium carbide. The crystal lattice parameter of titanium carbide determined by XRD turned out considerably smaller than known values for equiatomic titanium carbide. It is established using local EPMA of carbide inclusions in the composite structure that the carbon-to-titanium weight ratio is 0.21 instead of 0.25 for equiatomic titanium carbide. Iron and silicon concentrations in carbide are negligibly low, those of oxygen and nickel are lower than 1%, and that of chromium is 2.5 wt %. It is concluded based on the analysis of the known data on the influence of all listed impurities on the titanium carbide lattice that the deficit of carbon is the main cause of a decrease in the lattice parameter.
| Язык оригинала | Английский |
|---|---|
| Страницы (с-по) | 282-289 |
| Число страниц | 8 |
| Журнал | Russian Journal of Non-Ferrous Metals |
| Том | 60 |
| Номер выпуска | 3 |
| DOI | |
| Состояние | Опубликовано - 1 мая 2019 |
Отпечаток
ASJC Scopus subject areas
- Mechanics of Materials
- Surfaces, Coatings and Films
- Metals and Alloys
Цитировать
Synthesis of TiC–NiCrBSi Binder Alloy Composite Powders for Cladding and Deposition of Wear-Resistant Coatings. / Pribytkov, G. A.; Firsina, I. A.; Korzhova, V. V.; Krinitcyn, M. G.; Polyanskaya, A. A.
В: Russian Journal of Non-Ferrous Metals, Том 60, № 3, 01.05.2019, стр. 282-289.Результат исследований: Материалы для журнала › Статья
}
TY - JOUR
T1 - Synthesis of TiC–NiCrBSi Binder Alloy Composite Powders for Cladding and Deposition of Wear-Resistant Coatings
AU - Pribytkov, G. A.
AU - Firsina, I. A.
AU - Korzhova, V. V.
AU - Krinitcyn, M. G.
AU - Polyanskaya, A. A.
PY - 2019/5/1
Y1 - 2019/5/1
N2 - TiC–NiCrBSi binder metal matrix composites are fabricated by self-propagating high-temperature synthesis (SHS) in reaction powder mixtures of titanium, carbon (carbon black), and NiCrBSi alloy. It is established that stable combustion in a steady-state mode is possible with the content of a thermally inert metal binder in reaction mixtures up to 50%. Porous SHS cakes are crushed easily for subsequent separation by screening the composite-powder fraction necessary for the coating deposition. The synthesis products are studied by optical and scanning electron microscopy, X-ray diffraction (XRD), and electron probe microanalysis (EPMA). It is found that the average size of carbide inclusions in the composite structure depends on the content of thermally inert alloy powder in reaction mixtures and can be intentionally controlled in a wide range. The microhardness of granules of the composite powder formed by crushing SHS cakes decreases monotonically with an increase in the content of the metal binder softer than titanium carbide. The crystal lattice parameter of titanium carbide determined by XRD turned out considerably smaller than known values for equiatomic titanium carbide. It is established using local EPMA of carbide inclusions in the composite structure that the carbon-to-titanium weight ratio is 0.21 instead of 0.25 for equiatomic titanium carbide. Iron and silicon concentrations in carbide are negligibly low, those of oxygen and nickel are lower than 1%, and that of chromium is 2.5 wt %. It is concluded based on the analysis of the known data on the influence of all listed impurities on the titanium carbide lattice that the deficit of carbon is the main cause of a decrease in the lattice parameter.
AB - TiC–NiCrBSi binder metal matrix composites are fabricated by self-propagating high-temperature synthesis (SHS) in reaction powder mixtures of titanium, carbon (carbon black), and NiCrBSi alloy. It is established that stable combustion in a steady-state mode is possible with the content of a thermally inert metal binder in reaction mixtures up to 50%. Porous SHS cakes are crushed easily for subsequent separation by screening the composite-powder fraction necessary for the coating deposition. The synthesis products are studied by optical and scanning electron microscopy, X-ray diffraction (XRD), and electron probe microanalysis (EPMA). It is found that the average size of carbide inclusions in the composite structure depends on the content of thermally inert alloy powder in reaction mixtures and can be intentionally controlled in a wide range. The microhardness of granules of the composite powder formed by crushing SHS cakes decreases monotonically with an increase in the content of the metal binder softer than titanium carbide. The crystal lattice parameter of titanium carbide determined by XRD turned out considerably smaller than known values for equiatomic titanium carbide. It is established using local EPMA of carbide inclusions in the composite structure that the carbon-to-titanium weight ratio is 0.21 instead of 0.25 for equiatomic titanium carbide. Iron and silicon concentrations in carbide are negligibly low, those of oxygen and nickel are lower than 1%, and that of chromium is 2.5 wt %. It is concluded based on the analysis of the known data on the influence of all listed impurities on the titanium carbide lattice that the deficit of carbon is the main cause of a decrease in the lattice parameter.
KW - dispersity
KW - elemental composition
KW - hardness
KW - lattice parameter
KW - metal matrix composite
KW - self-propagating high-temperature synthesis
KW - structure
KW - titanium carbide
UR - http://www.scopus.com/inward/record.url?scp=85068237349&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85068237349&partnerID=8YFLogxK
U2 - 10.3103/S1067821219030118
DO - 10.3103/S1067821219030118
M3 - Article
AN - SCOPUS:85068237349
VL - 60
SP - 282
EP - 289
JO - Russian Journal of Non-Ferrous Metals
JF - Russian Journal of Non-Ferrous Metals
SN - 1067-8212
IS - 3
ER -