Results 281 to 290 of about 569,951 (336)

Effect of pack cementation temperatures on component, microstructure and anti-oxidation performance of Al-modified SiC coatings on C/C composites

, 2020
SiC coatings doped with Al were synthesized on the C/C composites using the pack cementation technique. We explored the microstructure, composition, as well as anti-oxidation performance of Al-doped SiC coatings with different preparation temperatures ...
Jinguo Huang, Ling-jun Guo, Min Xu, Pei Zhang   +3 more
semanticscholar   +1 more source

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
openaire   +2 more sources

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
openaire   +1 more source

Microstructures and oxidation behaviors of Al-modified and Al2O3-modified SiC coatings on carbon/carbon composites via pack cementation

, 2020
Al2O3-modified SiC (AOSC) and Al-modified SiC (ASC) coatings were prepared on carbon/carbon (C/C) composites by one-step pack cementation (PC). Their microstructures and anti-oxidation performances were studied.
Jinguo Huang, Ling-jun Guo, Kaijiao Li, Ningning Yan, Lei Zhou, Yang Li   +5 more
semanticscholar   +1 more source

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
openaire   +1 more source

Microstructure and formation mechanism of the Si-Cr dual-alloyed coating prepared by pack-cementation

Surface & Coatings Technology, 2020
In this study, two types of Si Cr coatings (named as SiCr-1 and SiCr-2) were fabricated on AISI 5140 steels by pack-cementation via different Si feedstocks, aiming to strengthen the steel surface and avoid the carbon-poor layer caused by chromizing ...
Jing Zeng, Jianjun Hu, X. Yang, Hongbin Xu, Hui Li, N. Guo, Q. Dong   +6 more
semanticscholar   +1 more source

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 ...
openaire   +1 more source

Studies on growth mechanism of intermediate layer of (Mo,W)5Si3 and interdiffusion in the (Mo,W)-(Mo,W)Si2 system prepared by pack cementation coating

, 2020
Silicide based oxidation resistant coatings were developed over Mo-30 W wt.% alloy using halide activated pack cementation process. Formation of single-layer [only (Mo,W)Si2] and double-layer [consisting of (Mo,W)Si2 outer and (Mo,W)5Si3 intermediate ...
B. Paul, J. Kishor, S. Majumdar, V. Kain
semanticscholar   +1 more source

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
openaire   +1 more source

A study on characterization of pack-cemented aluminide coating on metals

Journal of Materials Processing Technology, 2008
Abstract In this paper sample of Ni, plain steel and Cr-steel are pack cemented by Al 2 O 3 powder. The specimens were then isostatic oxidation tested. Using SEM and EPMA, the aluminide layers of samples are characterized and the rates of corrosion in the different samples are evaluated.
K. Mohammadi, A.K. Haghi
openaire   +1 more source