scholarly journals Heat Resistance of Nickel-Manganese-Molybdenum Steel with Boron-Nitride Hardening

2020 ◽  
Vol 969 ◽  
pp. 012003
Author(s):  
E N Eremin ◽  
A S Losev ◽  
S A Borodikhin
Keyword(s):  
Boron Nitride ◽  
Heat Resistance ◽  
Molybdenum Steel ◽  
Nickel Manganese

Use of boride compounds for hardening the steel of the Fe—Ni—Mn—Mo— V—Ti—Nb system

2020 ◽  
pp. 48-54
Author(s):  
E.N. Eremin ◽  
A.S. Losev ◽  
S.A. Borodikhin ◽  
I.A. Ponomarev
Keyword(s):  
Boron Nitride ◽  
Boron Carbide ◽  
Cored Wire ◽  
Hardening Mechanism ◽  
Molybdenum Steel ◽  
Nickel Manganese

Studies have shown, that the hardening mechanism of «30Н8Г6М3ФТБ» steel alloyed with a complex of carbide and boron nitride is determined by the compounds: Nb6C5, V6C5, NbC, Mo0,72Nb0,28B2, VB, Ti3N1,29, NbN and NbVN2 formed as a result of surfacing with flux-cored wire. This material can be used for surfacing parts that work in conditions of moderate wear. Keywords surfacing, nickel-manganese-molybdenum steel, cored wire, alloying, boron carbide, boron nitride, durometric properties. [email protected]

Heat resistance of coatings metal deposited by nickel-manganese-molybdenum fl ux-cored wire

2020 ◽  
pp. 511-515
Author(s):  
E.N. Eremin ◽  
A.S. Losev ◽  
I.A. Ponomarev ◽  
S.A. Borodikhin
Keyword(s):  
Heat Resistance ◽  
Elevated Temperatures ◽  
Mass Gain ◽  
Cored Wire ◽  
Protective Properties ◽  
Average Mass ◽  
Magnetite Fe3o4 ◽  
Hematite Fe2o3 ◽  
Nickel Manganese

The heat-resistance of coating from deposited steel 15N8G6M3FTB at temperature of 900 °С is studied. It is established that this dependence occurs in the first hours. The average mass gain of the metal scale of such coating at 900 °С is 0.0128 kg/(m2 •h). It is shown that the basis of metal scale of the composition 15N8G6M3FTB is hematite Fe2O3 and magnetite Fe3O4, as well as MnO, which have protective properties. The number of other phase compounds with high protective properties is negligible. The coating from steel 15N8G6M3FTB can be used for applying to the surface of parts operating at elevated temperatures.

scholarly journals Technological features of Ti–Cr–B–N coatings formation by magnetron sputtering method in a direct current

2019 ◽  
pp. 112-118
Author(s):  
S. D. Latushkina ◽  
I. M. Romanov ◽  
A. R. Luchenok ◽  
O. I. Posylkina ◽  
Yu. A. Harlan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Phase Composition ◽  
Boron Nitride ◽  
Magnetron Sputtering ◽  
Heat Resistance ◽  
Phase Formation ◽  
Direct Current ◽  
Titanium Diboride ◽  
Physical And Mechanical Properties ◽  
Constant Current

The results of the study of the phase composition and physical and mechanical properties of multicomponent coatings Ti– Cr–B–N formed by magnetron sputtering at a constant current from composite targets are presented. The features of phase formation of coatings when spraying targets containing titanium diboride (TiB2) or boron nitride (BN) as a boron-containing component are studied. The conditions of deposition of coatings with microhardness up to 32 GPA and heat resistance up to 800 °C are established.

Development of Crystallinity in Turbostratic Boron Nitride Derived from Polymeric Precursors

1991 ◽  
Vol 49 ◽  
pp. 954-955
Author(s):  
X. Qiu ◽  
A. K. Datye ◽  
T. T. Borek ◽  
R. T. Paine
Keyword(s):  
Thermal Treatment ◽  
Boron Nitride ◽  
Diffraction Pattern ◽  
Polymeric Precursors ◽  
Polymer Precursors ◽  
Diffuse Ring

Boron nitride derived from polymer precursors is of great interest for applications such as fibers, coatings and novel forms such as aerogels. The BN is prepared by the polymerization of functionalized borazine and thermal treatment in nitrogen at 1200°C. The BN powders obtained by this route are invariably trubostratic wherein the sheets of hexagonal BN are randomly oriented to yield the so-called turbostratic modification. Fib 1a and 1b show images of BN powder with the corresponding diffraction pattern in fig. 1c. The (0002) reflection from BN is seen as a diffuse ring with occational spots that come from crystals of BN such as those shown in fig. 1b. The (0002) lattice fringes of BN seen in these powders are the most characteristic indication of the crystallinity of the BN.

Structural relationships in the synthesis of cubic boron nitride thin films by ion-assisted deposition

1994 ◽  
Vol 52 ◽  
pp. 638-639
Author(s):  
D. L. Medlin ◽  
T. A. Friedmann ◽  
P. B. Mirkarimi ◽  
M. J. Mills ◽  
K. F. McCarty
Keyword(s):  
Boron Nitride ◽  
Ion Irradiation ◽  
Cubic Boron Nitride ◽  
Film Stress ◽  
Bonded Phases ◽  
Structural Relationships ◽  
Precursor Material ◽  
Pressure Synthesis ◽  
Microstructure Of The Material

The allotropes of boron nitride include two sp2-bonded phases with hexagonal and rhombohedral structures (hBN and rBN) and two sp3-bonded phases with cubic (zincblende) and hexagonal (wurtzitic) structures (cBN and wBN) (Fig. 1). Although cBN is synthesized in bulk form by conversion of hBN at high temperatures and pressures, low-pressure synthesis of cBN as a thin film is more difficult and succeeds only when the growing film is simultaneously irradiated with a high flux of ions. Only sp2-bonded material, which generally has a disordered, turbostratic microstructure (tBN), will form in the absence of ion-irradiation. The mechanistic role of the irradiation is not well understood, but recent work suggests that ion-induced compressive film stress may induce the transformation to cBN.Typically, BN films are deposited at temperatures less than 1000°C, a regime for which the structure of the sp2-bonded precursor material dictates the phase and microstructure of the material that forms from conventional (bulk) high pressure treatment.

Molecular insights on the dynamic stability of peptide nucleic acid functionalized carbon and boron nitride nanotubes

2021 ◽  
Vol 23 (1) ◽  
pp. 219-228
Author(s):  
Nabanita Saikia ◽  
Mohamed Taha ◽  
Ravindra Pandey
Keyword(s):  
Nucleic Acid ◽  
Boron Nitride ◽  
Nucleic Acids ◽  
Dynamic Stability ◽  
Peptide Nucleic Acid ◽  
Rational Design ◽  
Peptide Nucleic Acids ◽  
Boron Nitride Nanotubes ◽  
Molecular Hybrids ◽  
Single Wall Nanotubes

The rational design of self-assembled nanobio-molecular hybrids of peptide nucleic acids with single-wall nanotubes rely on understanding how biomolecules recognize and mediate intermolecular interactions with the nanomaterial's surface.

279: Inhibition of Cyclooxygenase-2 Pathway Overcomes the Heat-Resistance in Prostate Cancer Cells

2007 ◽  
Vol 177 (4S) ◽  
pp. 93-93
Author(s):  
Makoto Sumitomo ◽  
Kenji Kuroda ◽  
Takako Asano ◽  
Akio Horiguchi ◽  
Keiichi Ito ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Heat Resistance ◽  
Cancer Cells ◽  
Cyclooxygenase 2 ◽  
Prostate Cancer Cells
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