Development of alloyed and dispersion-strengthened MCrAlY coatings

被引：56

作者：

Taylor, TA ^{[1
]}

Bettridge, DF ^{[1
]}

机构：

[1] ROLLS ROYCE PLC, MFG ENGN, DERBY DE24 8BJ, ENGLAND

来源：

SURFACE & COATINGS TECHNOLOGY | 1996年 / 86卷 / 1-3期

关键词：

modified; McrAlY; coating; properties;

D O I：

10.1016/S0257-8972(96)02961-1

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

An on-going research program has investigated the effects of the separate and combined additions of Ta, Pt and an oxide dispersion to basic MCrAlY overlay coatings. The goals were improved oxidation and hot corrosion resistance, greater diffusional stability, and coating thermal expansion reduction in order to be closer to nickel base turbine blade alloys. It was found in cyclic burner rig testing at 1050 degrees C that each individual addition improved oxidation resistance of the baseline compositions. Oxide and Pt additions reduced thermal expansion. Creep resistance was greatly increased by oxide additions, which also strongly increased yield strength. Yield strength was modestly increased by Pt at low temperature and significantly increased by Ta at low to moderate temperatures.

引用

页码：9 / 14

页数：6

共 11 条

[1]

*ASTM, B32892 ASTM

[2]

*ASTM, E891 ASTM

[3]

HULL FC, 1969, METAL PROGR NOV, P139

[4]

KLAR E, 1984, METALS HDB, V7

[5]

KUHN WE, 1984, METALS HDB, V7

[6]

MEETHAM GW, 1986, MATER SCI TECH SER, V2, P290, DOI 10.1179/026708386790123189

[7] THE HOT HARDNESS TESTING FOR SUPERPLASTICITY IN NANOCRYSTALLINE YTTRIA-STABILIZED TETRAGONAL ZIRCONIA [J].

PRABHU, GB ;

BOURELL, DL .

SCRIPTA METALLURGICA ET MATERIALIA, 1995, 33 (05) :761-766

[8]

SMITH RW, 1980, P 9 INT THERM SPRAYI

[9]

SPINNER S, 1961, AM SOC TEST MATER PR, V61, P1221

[10]

STRANGMAN TE, 1978, THESIS U CONNECTICUT

← 1 2 →