Sage Journals: Discover world-class research

Abstract

High-pressure devices used in neutron scattering require materials with high strength, low neutron attenuation, and no activation. They should also be non-magnetic. Only very few materials fulfil these criteria. Here, it is reported on the manufacture and properties of the Ni–Cr–Al alloy (57.0 wt-% Ni, 40.0 wt-% Cr, and 3.0 wt-% Al). The casting and heat treatment to obtain the material with the optimal yield strength are described in detail. Synchrotron powder diffraction reveals that phases of the Ni₂Cr, Cr, and Ni₃Al types are present. Aging has no significant effect on their lattice parameters and volume fractions. The alloy has no magnetic order down to at least 1.9 K as evidenced by magnetic measurements and diffraction with polarised neutrons.

This paper is part of a Thematic Issue on The Crystallographic Aspects of Metallic Alloys.

Keywords

Neutron scattering high pressure magnetism mechanical properties Ni–Cr–Al alloy

Get full access to this article

View all access options for this article.

References

Eremets

MI.

High pressure experimental methods. Oxford: Oxford University Press; 1996.

Walker

IR.

Nonmagnetic piston-cylinder pressure cell for use at 35 kbar and above. Rev Sci Instr. 1999; 70(8):3402. doi: 10.1063/1.1149927

Walker

IR.

Considerations on the selection of alloys for use in pressure cells at low temperatures. Cryogenics (Guildf). 2005; 45(2):87–108. doi: 10.1016/j.cryogenics.2004.05.002

Palmer

Silevitch

Feng

Sub-Kelvin magnetic and electrical measurements in a diamond anvil cell with in situ tenability. Rev Sci Instr. 2015; 86(9):093901. doi: 10.1063/1.4929861

Klotz

Techniques in high pressure neutron scattering. Boca Raton: CRC Press; 2013.

Sadykov

RA.

Private communication (2016).

ASM handbook. Vol. 3, Alloy phase diagrams. ASM; 1992.

Wang

Cacciamani

Thermodynamic modeling of the Al-Cr-Ni system over the entire composition and temperature range. J Alloys Comp. 2016; 688:422–435. doi: 10.1016/j.jallcom.2016.07.130

Uwatoko

Todo

Ueda

Material properties of Ni-Cr-Al alloy and design of a 4 GPa class non-magnetic high-pressure cell. J Phys Condens Matter. 2002; 14:11291–11296. doi: 10.1088/0953-8984/14/44/469

10.

Bezaeva

Chareevd

Rochettee

Magnetic characterization of non-ideal single-domain monoclinic pyrrhotite and its demagnetization under hydrostatic pressure up to 2 GPa with implications for impact demagnetization. Phys Earth Planet Inter. 2016; 257:79–90. doi: 10.1016/j.pepi.2016.05.009

11.

Kolesnikov

Podlesnyak

Sadykov

Pressure effect on hydrogen tunneling and vibrational spectrum in α-Mn. Phys Rev B. 2016; 94:134301. doi: 10.1103/PhysRevB.94.134301

12.

Sadykov

Podlesnyak

High-pressure cells for study of condensed matter by diffraction and inelastic neutron scattering at low temperatures and in strong magnetic fields. J Phys Conf Ser. 2017; 941:012082. doi: 10.1088/1742-6596/941/1/012082

13.

Sadykov

Pappas

Bannenberg

1.5 GPa compact double-wall clamp cell for SANS and NSE studies at low temperatures and high magnetic fields. J Neutron Res. 2018; 20:25–33. doi: 10.3233/JNR-180056

14.

Grzechnik

Meven

Friese

Single-crystal neutron diffraction in diamond anvil cells with hot neutrons. J Appl Cryst. 2018; 51:351–356. doi: 10.1107/S1600576718000997

15.

Oliver

Pharr

GM.

An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments. J Mater Res. 1992; 7(6):1564–1583. doi: 10.1557/JMR.1992.1564

16.

Hammersley

Svensson

Hanfland

Two-dimensional detector software: from real detector to idealised image or two-theta scan. High Press Res. 1996; 14(4–6):235–248. doi: 10.1080/08957959608201408

17.

Le Bail

Whole powder pattern decomposition methods and applications: a retrospection. Powder Diffr. 2005; 20:316–326. doi: 10.1154/1.2135315

18.

Petříček

Dušek

Palatinus

Crystallographic computing system JANA2006: general features. Z Kristallogr. 2014; 229(5):345–352.

19.

Binns

Kamenev

McIntyre

Use of a miniature diamond-anvil cell in high-pressure single-crystal neutron Laue diffraction. IUCrJ. 2016; 3:168–179. doi: 10.1107/S2052252516000725

Ni–Cr–Al Alloy for neutron scattering at high pressures

Abstract

Keywords

Get full access to this article

References