Method of texturing polycrystalline iron/gallium alloys and compositions thereof
US8591669B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2005 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | Jan 15, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N35/85
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present disclosure is directed to a method of shaping a starting material of polycrystalline Fe—Ga alloy sheet of varying texture or crystal orientation. The method includes texturing the surface of the Fe—Ga alloy sheet to re-orient polycrystalline Fe—Ga crystals of the polycrystalline Fe—Ga alloy sheet to increase the uniformity of the crystal orientation of the Fe—Ga alloy sheet. The texturing step includes: initially deforming the Fe—Ga alloy sheet by hot rolling; subsequently deforming the previously hot rolled Fe—Ga alloy sheet by warm rolling; and annealing the previously warm rolled Fe—Ga alloy sheet. The method provides an alloy having a saturation magnetostriction potential greater than 60 ppm in applied fields of between 200-600 Oersted. During the annealing step H2S gas is added to introduce sulfur for promoting surface-energy-induced selective growth of {110} grain. The annealing step is performed in an atmosphere of argon gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.