Chromium oxide/metallocene binary catalysts for bimodal polyethylene: Hydrogen effects

2012 ◽  
Vol 213 ◽  
pp. 62-69 ◽  
Author(s):  
Beatriz Paredes ◽  
Rafael van Grieken ◽  
Alicia Carrero ◽  
Jovita Moreno ◽  
Alberto Moral
Keyword(s):  
Chromium Oxide ◽  
Bimodal Polyethylene ◽  
Binary Catalysts

Novel SiO2-Supported Chromium Oxide(Cr)/Vanadium Oxide(V) Bimetallic Catalysts for Production of Bimodal Polyethylene

2015 ◽  
Vol 9 (5) ◽  
pp. 462-472 ◽  
Author(s):  
Ruihua Cheng ◽  
Xin Xue ◽  
Weiwei Liu ◽  
Ning Zhao ◽  
Xuelian He ◽  
...  
Keyword(s):  
Vanadium Oxide ◽  
Chromium Oxide ◽  
Bimetallic Catalysts ◽  
Bimodal Polyethylene

Evaluation of Bimodal Polyethylene from Chromium Oxide/Metallocene Hybrid Catalysts for High Resistance Applications

2020 ◽  
Vol 14 (6) ◽  
pp. 2000032
Author(s):  
Beatriz Paredes ◽  
Jovita Moreno ◽  
Alicia Carrero ◽  
Rafael Grieken
Keyword(s):  
Chromium Oxide ◽  
High Resistance ◽  
Hybrid Catalysts ◽  
Bimodal Polyethylene

Development of novel chromium oxide/metallocene hybrid catalysts for bimodal polyethylene

Polymer ◽  
2011 ◽  
Vol 52 (9) ◽  
pp. 1891-1899 ◽  
Author(s):  
J. Moreno ◽  
R. van Grieken ◽  
A. Carrero ◽  
B. Paredes
Keyword(s):  
Chromium Oxide ◽  
Hybrid Catalysts ◽  
Bimodal Polyethylene

Production of bimodal polyethylene on chromium oxide/metallocene binary catalyst: Evaluation of comonomer effects

2017 ◽  
Vol 315 ◽  
pp. 46-57 ◽  
Author(s):  
Jovita Moreno ◽  
Beatriz Paredes ◽  
Alicia Carrero ◽  
Daniel Vélez
Keyword(s):  
Chromium Oxide ◽  
Binary Catalyst ◽  
Bimodal Polyethylene

The spalling of chromium oxide on an FeCr alloy

1966 ◽  
Vol 6 (11-12) ◽  
pp. 549-550 ◽  
Author(s):  
V HOWES
Keyword(s):  
Chromium Oxide ◽  
Fecr Alloy

Chemical deposition of hard composite coatings Ni–Cu–P–Cr2O3

2020 ◽  
pp. 179-181
Author(s):  
A.A. Abrashov A.A. ◽  
E.G. Vinokurov ◽  
M.A. Egupova ◽  
V.D. Skopintsev
Keyword(s):  
Chromium Oxide ◽  
Alkaline Solution ◽  
Composite Coatings ◽  
Chemical Deposition ◽  
Alkaline Solutions ◽  
Functional Surface ◽  
Heat Treated ◽  
Weakly Acid Solution ◽  
Coating Composition ◽  
Weakly Acidic Solution

The technological (deposition rate, coating composition) and functional (surface roughness, microhardness) characteristics of chemical composite coatings Ni—Cu—P—Cr2O3 obtained from weakly acidic and slightly alkaline solutions are compared. It is shown that coatings deposited from slightly alkaline solution contain slightly less phosphorus and chromium oxide than coatings deposited from weakly acid solution (2...3 % wt. phosphorus and up to 3.4 % wt. chromium oxide), formed at higher rate (24...25 microns per 1 hour of deposition at temperature of 80 °C), are characte rized by lower roughness and increased microhardness. The Vickers microhardness at 0.05 N load of composite coatings obtained from slightly alkaline solution and heat-treated at 400 °C for 1 hour is 13.5...15.2 GPa, which is higher than values for coatings deposited made of weakly acidic solution. The maximum microhardness of coatings is achieved at concentration 20 g/l of Cr2O3 particles. The technology of chemical deposition of Ni—Cu—P—Cr2O3 coatings formed in slightly alkaline solution is promising for obtaining of materials with increased hardness and wear resistance.

Visualization and characterization of localized outgassing position on surface-treated specimens: Chromium oxide layer on stainless steel

2019 ◽  
Vol 492 ◽  
pp. 280-284
Author(s):  
Naoya Miyauchi ◽  
Tomoya Iwasawa ◽  
Taro Yakabe ◽  
Masahiro Tosa ◽  
Toyohiko Shindo ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Oxide Layer ◽  
Chromium Oxide ◽  
Chromium Oxide Layer
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