Results 151 to 160 of about 53,034 (205)

Verschleißmechanismen von CBN-Körnern/Wear mechanisms of CBN grains – Studies to identify and quantify CBN grain wear mechanisms

wt Werkstattstechnik online, 2021
Dieser Beitrag stellt die Ergebnisse von Verschleißuntersuchungen beim Einkornritzen mit CBN-Körnern dar. Der Fokus der Forschungsarbeit liegt auf der Identifizierung und Quantifizierung der Verschleißmechanismen in Abhängigkeit von den Prozesseinstellgrößen und den Korneigenschaften.
Thomas Bergs, Marc Bredthauer, Patrick Mattfeld, Sebastian Barth   +3 more
openaire   +1 more source

cBN–Ti3SiC2 composites

Diamond and Related Materials, 2004
Abstract cBN–Ti3SiC2 composites with different cBN volume ratio were sintered by high pressure hot pressing. From the microscopic observation it could be concluded that the samples exhibit a porous less, dense structure. Various phase (TiB2, SiC4, TiC and SiC been formed in the cBN–Ti3SiC2 interface.
E. Benko, P. Klimczyk, S. Mackiewicz, T.L. Barr, E. Piskorska   +4 more
openaire   +1 more source

Controversy about ultrahard nanotwinned cBN

Nature, 2013
Arising from Y. Tian et al. , 385–388 (2013)10.1038/nature11728 Tian et al.1 report synthesis of “nanotwinned” cubic boron nitride (“nt-cBN”). These authors claim that its unprecedented Vickers hardness of 108 GPa is due to nanotwinning, and that hardening of cBN is continuous with decreasing twin ...
Natalia, Dubrovinskaia, Leonid, Dubrovinsky   +1 more
openaire   +2 more sources

????????????-?????????????????? ?????????????????????? ???? ?????????????????? ???????????????????????????????? ????????????????????, ?????????????????? ?? ???????????????? cBN ???????????? ????????????????????????

2018
The physical-mechanical properties ????BN, obtained by reactionary sintering with aluminium at high pressure and a heat from the ??BN powders different dispersity were researched. Polycrystals from the submicronic powder, nanosize fractions containing, were retried aggregate size of an initial powder.
  +6 more sources

?????????????????? ?????????????????????????????? ???????????????????? ?????????? BL ???? ???????????? cBN ???? ???????????????????? ???????????????? ???????????? ?????? ??????????????????

2020
Using the HPHT technology in the temperature interval 1600-2400 ??C, the processes of formation of superhard ceramic-matrix composites in the cBN-HfC-(Al) and cBN-???????C-(Al) systems have been investigated. With the original ratio of components cBN:carbide:(Al) being 60:35:5 vol.
openaire   +2 more sources

Preparation of SiAlON-cBN Composites Using Ni Nanoparticle Precipitated cBN Powders

Key Engineering Materials, 2012
SiAlON Was Mixed with Ni Nanoparticle Precipitated cBN (SiAlON-cBN/Ni) and Sintered by Spark Plasma Sintering at 1923 K for a Holding Time (tH) of 0 to 1.8 Ks. the Effect of Ni Nanoparticle and Holding Time on the Phase Transformation of cBN to Hexagonal (hBN), Densification, Microstructure and Hardness of the SiAlON-cBN Composites Was Studied.
Jian Feng Zhang, Rong Tu, Takashi Goto
openaire   +1 more source

Preparation and characterization of cBN-based composites from cBN-Ti3AlC2 mixtures

Diamond and Related Materials, 2016
Abstract Cubic boron nitride (cBN)-based composites were prepared at ~ 5.5 GPa and ~ 1350 °C with different mass ratios of cBN-Ti3AlC2 mixtures as starting materials. Ti3AlC2 decomposed and reacted with cBN during high pressure and high temperature (HPHT) sintering. TiC, TiC0.7N0.3, TiB2, and AlN were then formed.
Limin Yang, Jianhong Gong, Zhenming Yue, Xingrong Chu   +3 more
openaire   +1 more source

???????????????????? ???????????????????????????? ?????????????????????? ?? ???????????????????????? ???????????????? ???? ???????????? ?? cBN ?????? ???????????????? ???????????????????????????? ???????????????????? ???????????????????????? ????????????????, ?????????????????????????????? ?????? ?????????????????????????? ??????????????????????

2019
?????????????????????? ?????????????????????? ???????????????????? ???????????????????????????? ?????????????????????? ?? ???????????????????????? ???????????????? ?? ?????????? ???????????????? ???????????????????????? ???????????????????? (???????????????????????? ????????????????, ?????????????????????? ???????????????????????????? ????????????), ???
openaire   +3 more sources

Mikrofräswerkzeuge mit Schneiden aus cBN*/Micro-cutting tools with cBN cutters

wt Werkstattstechnik online, 2018
Die Mikrozerspanung ist eine Kerntechnologie bei der Fertigung von Mikrospritzgussformen. Die hohen Ansprüche an die geometrische Genauigkeit und Oberflächenrauheit erfordern den Einsatz hochfester Werkstoffe. Jedoch unterliegen aktuelle Fräswerkzeuge bei der Mikrozerspanung einem hohen Verschleiß.
E. Uhlmann, J. Polte, M. Polte, Y. Kuche, H. Wiesner   +4 more
openaire   +1 more source

????????????????????????????????? ?????????????????????? ???????????????????? ???????????????????? ???????????? cBN-????, cBN-Al, cBN-???????????????????? ??????????-Al, ?????????????????? ???????????????????? ?????????????????? ???? ???????????????? ??????????

2018
???????????????????? ????????????-?????????????????? ?????????????????????? (??????????????, ??????????????????, ???????????????????????????????????? ???? ???? ???????????????????? ?????? ?????????????????????? ????????????????) ?????????????????? ???????????????????? ?????????????????? ?????? ???????????????? ?????????? ????????????????????????????????
openaire   +1 more source