Properties of alumina coatings prepared on silica-based ceramic substrate by plasma spraying and sol-gel dipping methods

Abstract Inspired by the micro-nano structure on the surface of biological materials or living organisms, micro-nano structure has been widely investigated in the field of functional coatings. Due to its large specific surface area, porosity, and dual-scale structure, it has recently attracted special attention. The typical fabrication processes of micro-nano structured coatings include sol-gel, hydrothermal synthesis, chemical vapor deposition, etc. This paper presents the main features of a recent deposition and synthesis technique, liquid plasma spraying (LPS). LPS is an important technical improvement of atmospheric plasma spraying. Compared with atmospheric plasma spraying, LPS is more suitable for preparing functional coatings with micro-nano structure. Micro-nano structured coatings are mainly classified into hierarchical-structure and binary-structure. The present study reviews the preparation technology, structural characteristics, functional properties, and potential applications of LPS coatings with a micro-nano structure. The micro-nano structured coatings obtained through tailoring the structure will present excellent performances.

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Fabrication of ceramic substrate‐reinforced and free forms by mandrel plasma spraying metal–ceramic composites

Journal of Vacuum Science & Technology A Vacuum Surfaces and Films ◽

10.1116/1.572856 ◽

1985 ◽

Vol 3 (6) ◽

pp. 2450-2455 ◽

Cited By ~ 1

Author(s):

R. J. Quentmeyer ◽

G. McDonald ◽

R. C. Hendricks

Keyword(s):

Plasma Spraying ◽

Ceramic Composites ◽

Ceramic Substrate ◽

Metal Ceramic

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Evaluate Mechanical Behaviour of Alumina Coated Steel Alloy Using Slow Strain Rates Test

Advanced Science Engineering and Medicine ◽

10.1166/asem.2019.2453 ◽

2019 ◽

Vol 11 (11) ◽

pp. 1049-1052

Author(s):

Dalip Singh ◽

Dharmesh Yadav ◽

Ajay Saini ◽

Veena Dhayal ◽

D. C. Agarwal

Keyword(s):

Mechanical Property ◽

Sol Gel ◽

Dip Coating ◽

Alumina Coating ◽

Slow Strain Rate Test ◽

Steel Alloy ◽

Coated Steel ◽

Alumina Coatings ◽

Sem Images ◽

Coating Method

This investigation is concerned with the mechanical property enhancement of the steel alloy by deposition of alumina coating using dip coating method. Alumina coatings were deposited using oxime-modified aluminum(III) isopropoxide as a sol–gel precursor. The Scanning electron microscopy (SEM) images of the coated samples suggest deposition of uniform alumina coatings and alumina composition over steel alloy. The mechanical property of the bare, dip coated steel alloy samples were investigated by the slow strain rate test (SSRT). The SSRT indicates that dip coated steel alloy shows higher ultimate tensile strength as compare to the bare samples.

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