Abstract:
A coil material capable of contributing to an improvement of the productivity of a high-strength magnesium alloy sheet and a method for manufacturing the coil material are provided. Regarding the method for manufacturing a coil material through coiling of a sheet material formed from a metal into the shape of a cylinder, so as to produce the coil material, the sheet material is a cast material of a magnesium alloy discharged from a continuous casting machine and the thickness t (mm) thereof is 7 mm or less. The sheet material 1 is coiled with a coiler while the temperature T (°C) of the sheet material 1 just before coiling is controlled to be a temperature at which the surface strain ((t/R) x 100) represented by the thickness t and the bending radius R (mm) of the sheet material 1 becomes less than or equal to the elongation at room temperature of the sheet material 1.
Abstract:
The present III-nitride crystal manufacturing method, a method of manufacturing a III-nitride crystal (20) having a major surface (20 m ) of plane orientation other than {0001}, designated by choice, includes: a step of slicing III-nitride bulk crystal (1) into a plurality of III-nitride crystal substrates (10 p ), (10 q ) having major surfaces (10 pm ), (10 qm ) of the designated plane orientation; a step of disposing the substrates (10 p ), (10 q ) adjoining each other sideways in such a way that the major surfaces (10 pm ), (10 qm ) of the substrates (10 p ), (10 q ) parallel each other and so that the [0001] directions in the substrates (10 p ), (10 q ) are oriented in the same way; and a step of growing III-nitride crystal (20) onto the major surfaces (10 pm ), (10 qm ) of the substrates (10 p ), (10 q ).
Abstract:
A method of growing a good-quality single crystal of a Group III element nitride with satisfactory reproducibility; and a single crystal of a Group III element nitride obtained by the growth method. The method comprises growing a single crystal (3) of a Group III element nitride in a crystal growth vessel (11), and is characterized in that a porous object which is made of a metal carbide and has a porosity of 0.1-70% is used as at least part of the crystal growth vessel (11). Due to the use of this crystal growth vessel (11), 1-50% of a raw-material gas (4) present in the crystal growth vessel (11) can be discharged from the crystal growth vessel (11) through pores of the porous object.