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Journal of Material Cycles and Waste Management

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01-01-2015 | ORIGINAL ARTICLE

Development of wear resistant coatings using LD slag premixed with Al₂O₃

Authors: Pravat Ranjan Pati, Alok Satapathy

Published in: Journal of Material Cycles and Waste Management | Issue 1/2015

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Abstract

Linz–Donawitz slag (LDS) is a major solid waste generated in huge quantities during steel making. It comes from slag formers, such as burned lime/dolomite and from oxidizing of silica, iron, etc., while refining the iron into steel in the LD furnace. This work aims at utilization of waste LDS to develop surface coatings by plasma spraying technique. This technology has the advantage of being able to process various low-grade ore minerals to obtain value-added products and also to deposit materials, generating near homogeneous coatings with the desired microstructure. Coatings prepared for this investigation are characterized in terms of their thickness and adhesion strength. Coatability of LDS is assessed by finding deposition efficiency. Erosion wear characteristics of these coatings are also studied. Premixing of Al₂O₃ powder with LDS is found to substantially improve the interfacial adhesion, and the maximum adhesion strength of 33.77 MPa is recorded in such coatings with 30 wt% of Al₂O₃ content in the LDS–Al₂O₃ mix. It is found that the operating power levels of the plasma torch affect the adhesion strength, coating deposition efficiency and mean thickness of the coatings. This work opens up a new avenue for utilization of LD slag as a potential coating material.

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Title: Development of wear resistant coatings using LD slag premixed with Al2O3
Authors: Pravat Ranjan Pati
Alok Satapathy
Publication date: 01-01-2015
Publisher: Springer Japan
Published in: Journal of Material Cycles and Waste Management / Issue 1/2015
Print ISSN: 1438-4957
Electronic ISSN: 1611-8227
DOI: https://doi.org/10.1007/s10163-014-0234-1

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