Investigation of structure and properties of thermal coatings of WC-Co-Cr system produced by high-velocity methods of spraying

The microstructure of spray coatings using a newly developed thermal spray technique, High Velocity Arc Spray (HVAS), was studied and compared with those of regular arc sprayed coatings. The mechanical and wear properties of HVAS coatings were also investigated. The test results showed that HVAS coatings had better mechanical properties than those of regular arc sprayed coatings. The bonding strength of HVAS Al and 3Cr13 coatings was increased by 114 percent and 51.8 percent; the relative wear resistance of HVAS coatings was about twice that of regular arc sprayed coatings. The difference of microstructure and tribological properties between HVAS and regular arc sprayed coatings was discussed. [S0742-4787(00)00203-4]

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Changes in the Structure and Properties of Single- and Multilayer Materials Under the Influence of the High-Velocity Stream of Microparticles

High Velocity Microparticles in Space ◽

10.1007/978-3-030-04158-8_4 ◽

2019 ◽

pp. 85-98

Author(s):

Anatoly Belous ◽

Vitali Saladukha ◽

Siarhei Shvedau

Keyword(s):

High Velocity ◽

Structure And Properties ◽

Multilayer Materials

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EFFECT OF NON-MONOTONIC AND QUASI-MONOTONIC DEFORMATION ON THE STRUCTURE AND PROPERTIES OF A LOW-ALLOYED BRONZE OF THE Cu-Cr SYSTEM

Вестник Башкирского университета ◽

10.33184/bulletin-bsu-2018.2.3 ◽

2018 ◽

Vol 7 (2) ◽

pp. 269

Author(s):

R. N. Asfandiyarov ◽

G. I. Raab ◽

D. A. Aksenov ◽

D. V. Gunderov ◽

G. I. Zamanova

Keyword(s):

Structure And Properties ◽

Cr System

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Processing and Properties of Nanostructured Alloy Coatings in the Binary Ni-Cr System

MRS Proceedings ◽

10.1557/proc-0903-z05-33 ◽

2005 ◽

Vol 903 ◽

Author(s):

Pablo Castro ◽

Christopher A. Schuh ◽

Hong Liang

Keyword(s):

Solid Lubricant ◽

Composite Coatings ◽

Tribological Performance ◽

Hard Material ◽

Structure And Properties ◽

Coating Structure ◽

Electrodeposition Process ◽

Cr System ◽

Steel Substrates ◽

Disk Testing

AbstractUsing a scalable electrodeposition process, nanocrystalline Ni-Cr alloy coatings have been produced on copper and steel substrates, and the roles of various processing variables on the resulting coating structure and properties have been investigated. The possibility of producing composite coatings of wear resistant nanostructured Ni-Cr alloys containing graphite or MoS2 particles has also been studied; the co-deposition of solid lubricant particles improved the tribological performance of the coatings in ball-on-disk testing. The combination of a hard material such as nanocrystalline Ni-Cr alloy with a solid lubricant has a great potential for new surface modification developments.

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Galactic orbits of stars

Symposium - International Astronomical Union ◽

10.1017/s0074180900105340 ◽

1966 ◽

Vol 25 ◽

pp. 93-97

Author(s):

Richard Woolley

Keyword(s):

Globular Cluster ◽

Potential Field ◽

High Velocity ◽

Velocity Vector ◽

Variable Stars ◽

The Sun ◽

Proper Motions ◽

Rr Lyrae ◽

The Galaxy

It is now possible to determine proper motions of high-velocity objects in such a way as to obtain with some accuracy the velocity vector relevant to the Sun. If a potential field of the Galaxy is assumed, one can compute an actual orbit. A determination of the velocity of the globular clusterωCentauri has recently been completed at Greenwich, and it is found that the orbit is strongly retrograde in the Galaxy. Similar calculations may be made, though with less certainty, in the case of RR Lyrae variable stars.

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