Oxidation behavior of a Re-base diffusion-barrier/β-NiAl coating on Nb-5Mo-15W at high temperatures

被引：46

作者：

Matsumura, Y

Fukumoto, M

Hayashi, S

Kasama, A

Iwanaga, I

Tanaka, R

Narita, T

机构：

[1] Hokkaido Univ, Grad Sch Engn, Res Grp Interface Control Engn, Kita Ku, Sapporo, Hokkaido 0608628, Japan

[2] Japan Ultrahigh Temp Mat Res Inst, Ube, Yamaguchi 5070801, Japan

来源：

OXIDATION OF METALS | 2004年 / 61卷 / 1-2期

关键词：

niobium alloy (based on Nb-5Mo-15W); coatings; diffusion-barrier coating; high-temperature oxidation;

D O I：

10.1023/B:OXID.0000016279.88052.d9

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A beta-NiAl coating with or without a Re-base alloy layer was formed on a Nb-5Mo-15W alloy. The coated alloys were oxidized isothermally in air at 1373 and 1473 K. Electroplating of a high ( more than 70 at .%)- Re-Ni film, Cr-pack cementation, Ni plating, and then Al-pack cementation, in this sequence, formed a coating structure with Re-base alloy and beta-NiAl layers. The Re-base alloy layers were comprised of an outer sigma-phase in the Re-Cr(Ni) system and an inner chi-phase in the Re-Nb(Cr) system. It was found that reaction between the beta-NiAl and the alloy substrate was significantly suppressed when the Re-base alloy layers were present. The Re-base sigma and chi phases were found to be good candidates for a diffusion barrier against inward-Al diffusion because they have very low solubilities for Al.

引用

页码：105 / 124

页数：20

共 38 条

[1]

AYIMORE DW, 1959, J ELECTROCHEM SOC, V106, P1010

[2]

Cockeram B. V., 1995, High-Temperature Ordered Intermetallic Alloys VI. Symposium, P1327

[3] PROTECTIVE AL2O3 SCALE FORMATION ON NBAL3-BASE ALLOYS [J].

DOYCHAK, J ;

HEBSUR, MG .

OXIDATION OF METALS, 1991, 36 (1-2) :113-141

[4] Coatings of Nb-based alloy by Cr and/or Al pack cementations and its oxidation behavior in air at 1273-1473 K [J].

Fukumoto, M ;

Matsumura, Y ;

Hayashi, S ;

Narita, T ;

Sakamoto, K ;

Kasama, A ;

Tanaka, R .

MATERIALS TRANSACTIONS, 2003, 44 (04) :731-735

[5]

FUKUMOTO M, 2002, REPORT 123 COMMITTEE, V43, P383

[6]

FUKUMOTO M, UNPUB OXID MET

[7]

FUKUMOTO M, UNPUB MAT T JIM

[8] OXIDATION AND INTERGRANULAR DISINTEGRATION OF THE ALUMINIDES NIAL AND NBAL3 AND PHASES IN THE SYSTEM NB-NI-AL [J].

GRABKE, HJ ;

STEINHORST, M ;

BRUMM, M ;

WIEMER, D .

OXIDATION OF METALS, 1991, 35 (3-4) :199-222

[9]

Graham A. K., 1971, ELECTROPLATING ENG H

[10]

HAUFFE K, 1965, OXID MET, P236

← 1 2 3 4 →