Results 151 to 160 of about 1,028 (199)

Pack cementation diffusion coatings

1996
Pack cementation is an in situ chemical vapor deposition (CVD) batch process that has been used to produce corrosion- and wear-resistant coatings on inexpensive or otherwise inadequate substrates for over 75 years [1]. The traditional pack consists of four components: the substrate or parts to be coated; the masteralloy (i.e. a powder of the element or
Robert Bianco, Robert A. Rapp
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Aluminum Pack Cementation on Mo–Si–B Alloys

Journal of The Electrochemical Society, 2006
The application of a pack cementation coating of aluminum on Mo-rich Mo–Si–B alloys prior to oxygen exposure yields a significant improvement in the oxidation resistance over a wide temperature range (732–1372 °C). Upon exposure to oxygen, the Mo3Al8-rich layer that forms during the aluminum pack cementation treatment develops a protective Al2O3 layer ...
R. Sakidja, F. Rioult, J. Werner, J.H. Perepezko   +3 more
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Superfine cement for improving packing density, rheology and strength of cement paste

Cement and Concrete Composites, 2012
Abstract Superfine cement is a cement ground to a much higher fineness than ordinary cement. The addition of a small quantity of superfine cement to fill into the voids of ordinary cement can improve the packing density of the cement and thereby reduce the amount of mixing water needed to fill the voids. In this study, the effects of superfine cement
Chen, JJ, Kwan, AKH
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Composite cements: synergistic effects of particle packing and pozzolanicity

Proceedings of the Institution of Civil Engineers - Engineering Sustainability, 2022
The production of cement is a carbon dioxide-intensive process. Replacing ordinary Portland cement (OPC) with industrial by-products can bring down the carbon footprint associated with cement production. Various industrial residues are currently used as alternative cementitious materials in this regard.
Vijayakumar Duraisamy, Gopinath Athira, Abdulsalam Bahurudeen, Prakash Nanthagopalan   +3 more
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Synthesis of higher manganese silicides by pack cementation

AIP Conference Proceedings, 2019
Higher Manganese Silicides (HMS), commonly referred to as MnSi1.7, have currently attracted great attention due to their potential use in high temperature thermoelectric applications. These compounds demonstrate attractive thermoelectric properties –with a maximum value of figure of merit ZT at least 0.7 for the undoped material –good thermal and ...
Aikaterini Teknetzi, Dimitrios Stathokostopoulos, Evangelia Tarani, Adamantios Margaronis, Euripides Hatzikraniotis, Eleni Pavlidou, Konstantinos Chrissafis, George Vourlias   +7 more
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Particle Packing Density and Limestone Fillers for More Sustainable Cement

Key Engineering Materials, 2012
Cement blending with mineral admixtures, especially with byproduct or waste product powder, can effectively reduce consumption of cement and promote the ecology. Recently, an innovative concept was proposed to replace of coarse cement grains by the inert fillers for sustainable cement in the low w/c concrete cement.
He, Huan, Courard, Luc, Pirard, Eric
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Surface Engineering through Pack Cementation Processes

ECS Meeting Abstracts, 2011
Abstract not Available.
Vilupanur A. Ravi, Alejandro Cuevas, Kimberly Schumann, Christopher Simpson, Marcelino Rubio, Andrew Schissler, Alexander Ly, Bradley Harrison, Thuan Nguyen, Andrew Lech, Richard Kaner, Bruce A. Pint, James Haynes   +12 more
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Codepositing elements by halide-activated pack cementation

JOM, 1991
The codeposition of two or more elements in a halide-activated cementation pack is inherently difficult because of large differences in the thermodynamic stabilities for their volatile halides. However, through a computer-assisted analysis of the pack equilibria, combinations of suitable master alloys and activator salts can be identified.
Robert Bianco, Mark A. Harper, Robert A. Rapp   +2 more
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Pack Cementation Processes

2013
Abstract Pack cementation is the most widely employed method of diffusion coating. This article briefly reviews pack cementation processes of aluminizing, chromizing, and siliconizing. It contains tables that list typical characteristics of pack cementation processes and commercial applications of pack cementation aluminizing, which is ...
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Synthesis and characterisation of pack cemented aluminide coatings on metals

Applied Surface Science, 2004
Abstract The exposition of metallic materials to high temperature environments leads to their corrosion because of oxidation or sulphidation. One way to protect such materials is to produce an Al 2 O 3 layer which needs to be continuous enough to limit diffusion of oxygen or metallic elements, and withstand this corrosion.
C Houngninou, S Chevalier, J.P Larpin
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