Zobrazeno 1 - 10
of 67
pro vyhledávání: '"R.V. Krishnarao"'
Publikováno v:
Defence Technology, Vol 14, Iss 5, Pp 385-395 (2018)
Filler materials of (ZrB2-SiC-B4C-YAG) composite were developed for gas tungsten arc welding (GTAW) of the ZrB2-SiC and Cf-SiC based composites to themselves and to each other. Reaction with filler material, porosity and cracks were not observed at w
Externí odkaz:
https://doaj.org/article/131a14386f434d69bc5bec3609fef1b3
Autor:
R.V. Krishnarao, G. Madhusudhan Reddy
Publikováno v:
Defence Technology, Vol 11, Iss 3, Pp 188-196 (2015)
The difficulty in fabricating the large size or complex shape limits the application of ZrB2–SiC composites. Joining them by fusion welding without or with preheating, controlled cooling under protective gas shield leads to thermal shock failure or
Externí odkaz:
https://doaj.org/article/116fdafa010f42a0bc0d7c984cf541a7
Publikováno v:
Corrosion Science. 141:72-80
Si3N4, (ZrO2+B4C + Si) and (ZrB2+SiC + B4C + Y2O3+Al2O3) were used as precursors for in-situ formation of SiC, ZrB2-SiC and ZrB2-SiC-B4C-YAG coatings respectively. The oxidation behavior of coated C/C composites was studied by cyclic oxidation in air
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9ab6f7ad603dcdf9ec4d1bdc5443b394
https://doi.org/10.1016/j.corsci.2018.07.002
https://doi.org/10.1016/j.corsci.2018.07.002
Joining of Cf-SiC composites and ZrB 2 -SiC based composites for ultra high temperature applications
Autor:
G. Madhusudhan Reddy, R.V. Krishnarao
Publikováno v:
Ceramics International. 44:10569-10578
Gas tungsten arc welding (GTAW) of Cf–SiC composites to themselves and to ZrB2-SiC based composites have been carried out with a filler material of (ZrB2-SiC-B4C-Y2O3-Al2O3) composite. The weld interfaces of joints of composites were clean and free
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7463491f8b10fff3b21321ddae13b0ea
https://doi.org/10.1016/j.ceramint.2018.03.080
https://doi.org/10.1016/j.ceramint.2018.03.080
Autor:
R.V. Krishnarao
Publikováno v:
Ceramics International. 43:1205-1209
The reduction of zircon (ZrSiO 4 ) with C and B 4 C results in the formation of impurity phases like ZrO 2 , ZrC, ZrSi, SiO 2 , SiC and borosilicate. Synthesis of pure ZrB 2 by eliminating SiO 2 in ZrSiO 4 in a single step reduction with B 4 C has be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34683a0a7576d09663c084ece0617076
https://doi.org/10.1016/j.ceramint.2016.10.064
https://doi.org/10.1016/j.ceramint.2016.10.064
Publikováno v:
International Journal of Refractory Metals and Hard Materials. 52:55-65
Pressureless sintering of (ZrB2–SiC–B4C) composites with (Y2O3 + Al2O3) additions has been studied. The vol.% of SiC, B4C, and (Y2O3 + Al2O3) was varied from (26, 24, and 16) to (5, 4, and 5) respectively. Hardness of composites has been found to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::015091424dc0e00aca2c70347e91c04f
https://doi.org/10.1016/j.ijrmhm.2015.05.013
https://doi.org/10.1016/j.ijrmhm.2015.05.013
Autor:
G. Madhusudhan Reddy, R.V. Krishnarao
Publikováno v:
Defence Technology, Vol 11, Iss 3, Pp 188-196 (2015)
The difficulty in fabricating the large size or complex shape limits the application of ZrB 2 –SiC composites. Joining them by fusion welding without or with preheating, controlled cooling under protective gas shield leads to thermal shock failure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac67636475413c85a137db0464eb9347
Publikováno v:
Ceramics International. 40:15647-15653
The formation of ZrB2 through reaction of ZrO2 with B4C without adding carbon has been studied at different temperatures between 1020 °C and 1600 °C. The ratio of ZrO2/B4C was optimized to produce a single phase ZrB2. By introducing Si species into
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a0507e2e61f83a2ffd28d9504200855
https://doi.org/10.1016/j.ceramint.2014.07.085
https://doi.org/10.1016/j.ceramint.2014.07.085
Publikováno v:
Journal of Alloys and Compounds. 496:572-576
The formation of B 4 C through carbothermal reduction of B 2 O 3 has been studied by varying boron to carbon molar ratio (B:C = 4: x ) where x = 2.66/2.0/0.833. The effect of potassium carbonate (K 2 CO 3 ), and ferric chloride (FeCl 3 ) on the elimi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6161c3110146c5afc02d5c5d22019d83
https://doi.org/10.1016/j.jallcom.2010.02.114
https://doi.org/10.1016/j.jallcom.2010.02.114
Publikováno v:
Journal of the European Ceramic Society. 29:2069-2077
Attempts have been made to study the effect of milling energy and type of grinding media on the mechanical activation during the production of MoSi 2 from a reaction between Mo and Si 3 N 4 . Powder mixtures of Mo and Si 3 N 4 in the molar ratios of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bbcc8c558df6f1a8975811433b29745
https://doi.org/10.1016/j.jeurceramsoc.2008.11.005
https://doi.org/10.1016/j.jeurceramsoc.2008.11.005