AN ELECTRON-DIFFRACTION INVESTIGATION OF THE DIFFUSE OMEGA-STRUCTURE IN QUENCHED TI-3D TRANSITION-METAL ALLOYS

被引：55

作者：

SINKLER, W ^{[1
]}

LUZZI, DE ^{[1
]}

机构：

[1] UNIV PENN, DEPT MAT SCI & ENGN, PHILADELPHIA, PA 19104 USA

来源：

ACTA METALLURGICA ET MATERIALIA | 1994年 / 42卷 / 04期

关键词：

D O I：

10.1016/0956-7151(94)90141-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Diffuse scattering resembling diffraction from the omega phase is investigated in quenched b.c.c. (beta) Ti-Cr using electron diffraction. A new structural model is presented which can reproduce the large shifts of diffuse peaks from the positions of omega-phase Bragg reflections which are seen in this system. Using the model it is proposed that CSRO in conjunction with an atomic size difference are responsible for the occurrence of this structure in quenched beta Ti-3d metal alloys. Evidence is presented for an electronic origin for CSRO in these systems.

引用

页码：1249 / 1260

页数：12

共 38 条

[1]

APAROV NN, 1975, FIZ MET METALLOVED+, V40, P1107

[2]

Bagariatskii A., 1958, SOV PHYS DOKL, V3, P1014

[3]

BLACKBURN MJ, 1967, T METALL SOC AIME, V239, P287

[4] SHORT-RANGE STRUCTURE OF TI AND ZR BCC SOLID-SOLUTIONS CONTAINING OMEGA PHASE .1. GENERAL DIFFRACTION THEORY AND DEVELOPMENT OF COMPUTATIONAL TECHNIQUES [J].

BORIE, B ;

SASS, SL ;

ANDREASS.A .

ACTA CRYSTALLOGRAPHICA SECTION A, 1973, A 29 (NOV1) :585-594

[5] SPIN DENSITY WAVE AND SOFT PHONON MODE FROM NESTING FERMI SURFACES [J].

CHAN, SK ;

HEINE, V .

JOURNAL OF PHYSICS F-METAL PHYSICS, 1973, 3 (04) :795-809

[6]

Chernov D., 1975, RUSS J PHYS CHEM, V49, P445

[7] AS-QUENCHED FORM OF OMEGA PHASE IN ZR-NB ALLOYS [J].

DAWSON, CW ;

SASS, SL .

METALLURGICAL TRANSACTIONS, 1970, 1 (08) :2225-&

[8] UNUSUAL DIFFUSE-SCATTERING INTENSITIES FROM NITROGEN IN NIOBIUM [J].

DOSCH, H ;

PEISL, J .

PHYSICAL REVIEW B, 1985, 32 (02) :623-626

[9]

DWIGHT AE, 1969, T METALL SOC AIME, V245, P389

[10]

DYAKONOVA NB, 1981, FIZ MET METALLOVED+, V52, P119

← 1 2 3 4 →