Temat: boron, - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Tribological properties of surface layer with boron
Autorzy:: Lubas, J.
Powiązania:: https://bibliotekanauki.pl/articles/242091.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: wear
sliding friction
surface treatment
boron
Opis:: The aim of the present work is to determine the influence of technologically produced boron surface layers on the friction parameters in the sliding pairs under the conditions of mixed friction. The tribological evaluation included ion nitrided, pack borided, laser borided, quenched and tempered surface layers and TiB2 coating deposited on 38CrAlMo5-10, 46Cr2 and 30MnB4 steels. Modified surface layers of annular samples were matched under test conditions with counter-sample made from AlSn20 bearing alloy. Tested sliding pairs were lubricated 15 W/40 Lotos mineral engine oil. The tribological tests were conducted on a T-05 block on ring tester. The applied steel surface layer modification with boron allow creating surface layers with pre-determined tribological characteristics reąuired for the elements of kinematic pairs operating in the conditions of sliding friction. Pack boronizing reduces the friction coefficient during the start-up of the frictional pair and the maximum start-up resistance level is similar to the levels of pairs with nitrided surface layers. Paper present comparison between surface roughness of annular sample and countersample before and after test, influence of surface treatment annular sample on change of friction coefficient vs. rotation speed and load, influence of surface treatment annular sample on moment of friction in function load of kinematics pair, influence of surface treatment annular sample on friction forces and temperature depending on load, as well as influence of surface treatment annular sample on wear of AlSn20 bearing alloy under various load conditions.
Źródło:: Journal of KONES; 2009, 16, 3; 213-221
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Tribological properties of sliding pairs with surface layer containing boron under mixed friction conditions
Autorzy:: Lubas, J.
Powiązania:: https://bibliotekanauki.pl/articles/242626.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: surface treatment
wear
sliding friction
boron
bearing alloy
Opis:: The aim of the present work is to determine the influence of surface layers containing boron on the friction parameters in sliding pairs under mixed friction conditions. The tribological evaluation included three production methods of surface layers with boron; pack boronizing, laser boronizing, and TiB2 coating deposited on 46Cr2 steel. Modified surface layers of ring specimens with 46Cr2 steel were matched under test conditions with a counterpart made from AlSn20 bearing alloy. Tested sliding pairs were lubricated with 5W/40 Lotos synthetic engine oil. The applied modification technologies of the surface layer of steel allowed for obtaining construction materials with predetermined tribological characteristics required for the elements of sliding pairs working undermixed friction conditions. The results showed differences in the wear of bearing alloy, as the effect of the interaction between the cooperating surface layers and of the physiochemical changes of their surfaces, induced by external forces. The TiB2 coating generated the highest friction resistance and bearing alloy wear. The pack borided surface layer reduces the friction coefficient, the moment during the start-up of the frictional pair and the wear of the bearing material. The analysis of the surface layer indicated that the content of aluminum on pack borided ring specimens reached 21%, and on the TiB2 coating, it exceeded 8%.
Źródło:: Journal of KONES; 2013, 20, 1; 185-192
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Structural and mechanical properties of boron nitride thin films deposited on steel substrates by pulsed laser deposition
Autorzy:: Gocman, K.
Kałdoński, T.
Mróz, W.
Burdyńska, S.
Prokopiuk, A.
Powiązania:: https://bibliotekanauki.pl/articles/244608.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: boron nitride
pulsed laser deposition
nanohardness
elastic modulus
critical load
Opis:: The article presents preliminary results of investigation on structure, morphology and mechanical properties of boron nitride thin films prepared by pulsed laser deposition on various steel substrates. In order to improve adhesion and reduce internal stresses, substrates were subjected to gas nitriding. To increase gas ionization in the chamber and provide the deposited particles with higher energy RF discharge generator was used. Structure and morphology of coatings were examined by atomic force microscopy (AFM) and Fourier transform infrared spectroscopy (FTIR). Mechanical properties like nanohardness (sclerometric) and elastic modulus (using approach curves) were characterized by UNMT. Adhesion of coatings was measured by scratch tests; critical load was determined on the basis of microscopic observation and friction force and acoustic emission runs. On the basis of obtained results, possibility of using steel as substrate for BN thin films deposition was confirmed. Stable, crystalline, multiphase coatings with good adhesion to the steel substrate were obtained. It was also proved that mechanical properties of prepared coatings and their adhesion to the substrates strongly depend on the type of the substrate. In the next stage tribological properties of BN, coatings will be examined in particular in terms of wear resistance and friction coefficient between coatings and steel.
Źródło:: Journal of KONES; 2011, 18, 1; 149-156
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Tribological characteristics of the surface layer of steel modified with boron under mixed friction conditions
Autorzy:: Lubas, J.
Powiązania:: https://bibliotekanauki.pl/articles/242290.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: tribology
surface modification
boron surface layers
AlSn20 bearing alloy
friction coefficient
Opis:: The aim of the present work is to determine the influence of technologically produced boron surface layers on the friction parameters in the sliding pairs under mixed friction conditions. The current boronizing processes allow obtaining surface layers of high hardness and high resistance to corrosion and wear, with low brittleness and no tendencies towards cracking However, the operation characteristics of these layers depend on the chemical composition, the structure of the surface layer, the method and parameters of their production, as well as any possible thermal treatment. The tribological evaluation included ion nitriding, powder-pack boronizing, laser boronizing, hardening and tempering surface layers and TiB2 coating deposited on ring samples. The ring samples were made from 38CrAlMo5-10, 46Cr2 and 30MnB4 steel. Modified surface layers of ring samples were matched under test conditions with counter-sample made from AlSn20 bearing alloy. Tested sliding pairs were lubricated 15W/40 Lotos mineral engine oil. The tribological tests were conducted on a T-05 block on ring tester. The applied steel surface layer modification with boron allow creating surface layers with pre-determined tribological characteristics required for the elements of kinematic sliding pairs operating under mixed friction conditions. Boronizing reduces the friction coefficient during the start-up of the frictional pair and the maximum start-up resistance level is similar to the levels of pairs with ion nitride surface layers.
Źródło:: Journal of KONES; 2011, 18, 2; 271-278
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "boron," wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język