Ti2AlC coatings deposited by High Velocity Oxy-Fuel spraying

被引：97

作者：

Frodelius, Jenny ^{[1
]}

Sonestedt, Marie ^{[2
]}

Bjorklund, Stefan ^{[3
]}

Palmquist, Jens-Petter ^{[4
]}

Stiller, Krystyna ^{[2
]}

Hogberg, Hans ^{[1
]}

Hultman, Lars ^{[1
]}

机构：

[1] Linkoping Univ, Thin Film Phys Div, Dept Phys, IFM, S-58183 Linkoping, Sweden

[2] Chalmers Univ Technol Microscopy & Microanal, Dept Appl Phys, S-41296 Gothenburg, Sweden

[3] Univ West, Dept Technol Math & Comp Sci, S-46186 Trollhattan, Sweden

[4] Kanthal AB, S-73427 Hallstahammar, Sweden

来源：

SURFACE & COATINGS TECHNOLOGY | 2008年 / 202卷 / 24期

基金：

瑞典研究理事会;

关键词：

MAX-phase; High Velocity Oxy-Fuel (HVOF); Phase transitions; X-ray diffraction; Scanning electron microscopy (SEM);

D O I：

10.1016/j.surfcoat.2008.06.184

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

High Velocity Oxy-Fuel has been utilized to spray coatings from Ti2AlC (MAXTHAL 211 (R)) powders. X-ray diffraction showed that the coatings consist predominantly of Ti2AlC with inclusions of the phases Ti3AlC2, TiC, and Al-Ti alloys. The fraction of Ti2AlC in coatings sprayed with a powder size of 38 mu m was found to increase with decreasing power of the spraying flame as controlled by the total gas flow of H-2 and O-2. A more coarse powder (56 mu m) is less sensitive to the total gas flow and retains higher volume fraction of MAX-phase in the coatings, however, at the expense of increasing porosity. X-ray pole figure measurements showed a preferred crystal orientation in the coatings with the Ti2AlC (0001) planes aligned to the substrate surface. Bending tests show a good adhesion to stainless steel substrates and indentation yields a hardness of 3-5 GPa for the coatings sprayed with a powder size of 38 mu m. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：5976 / 5981

页数：6

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