Abstract: A nuclear fusion system includes: a muon generation unit for generating negative muons; a gas supply unit for circulating and supplying gaseous deuterium or gaseous deuterium-tritium mixture as raw material gas for a nuclear fusion reaction; and a Laval nozzle for accelerating the raw material gas to supersonic velocity including a flow regulation portion in which the muons are decelerated and a reaction portion in which the nuclear fusion reaction occurs, wherein an oblique shockwave, which is generated as a result of collision of a shock wave generator arranged inside the reaction portion and the raw material gas accelerated to supersonic velocity, converges on a center axis of the Laval nozzle, and thereby a high-density gas target is retained in a gas phase, and wherein the muons are introduced into the high-density gas target, and thereby the nuclear fusion reaction is caused to occur.

Abstract: The present invention provides an iron-based metallic glass alloy powder comprising: an iron-based metal element group mainly comprising Fe; a setnimetal element group comprising Si, B, P, and C; a small amount of at least one degree-of-supercooling improvement element group selected from the group consisting of Nb and Mo; and optionally a corrosion resistance modification component, wherein the total amount of the semimetal element group and the total amount of the corrosion resistance modification component are set within predetermined ranges, and the iron-based metallic glass alloy powder has a particle size of 30 ?m or less.

Abstract: The present invention is to provide powder made of iron-based metallic glass, the corrosion resistance of which is improved over the conventional powder made of iron-based metallic glass. The basic composition includes a group of iron-based metallic elements that predominantly has Fe, a group of metalloid elements that consists of Si, B, P, and C, and a little amount of a group of elements for improving the degree of supercooling that consists of either or both of Nb and Mo. The powder made of the iron-based metallic glass is obtained by adding to the basic composition an element for improving the corrosion resistance. The obtained powder made of the iron-based metallic glass has an excellent corrosion resistance, an excellent magnetic property, and an excellent insulating property.

Abstract: The present invention is to provide powder made of iron-based metallic glass, the corrosion resistance of which is improved over the conventional powder made of iron-based metallic glass. The basic composition includes a group of iron-based metallic elements that predominantly has Fe, a group of metalloid elements that consists of Si, B, P, and C, and a little amount of a group of elements for improving the degree of supercooling that consists of either or both of Nb and Mo. The powder made of the iron-based metallic glass is obtained by adding to the basic composition an element for improving the corrosion resistance. The obtained powder made of the iron-based metallic glass has an excellent corrosion resistance, an excellent magnetic property, and an excellent insulating property.

Abstract: The present invention provides a Fe-group-based soft magnetic powder that is used for the pressed powder magnetic cores for a choke coil, reactor coil, etc., and that has a higher magnetic permeability. At least one selected from Fe, Co, or Ni that is generally used is used as the main component of the Fe-group-based alloy (iron-based alloy) soft magnetic powder. The soft magnetic powder is produced by adding a small amount (0.05-4 wt %) of Nb, V, Ta, Ti, Mo, or W, to the molten metal and by means of an inexpensive method such as the water-atomizing method.

Abstract: The present invention provides a Fe-group-based soft magnetic powder that is used for the pressed powder magnetic cores for a choke coil, reactor coil, etc., and that has a higher magnetic permeability. At least one selected from Fe, Co, or Ni that is generally used is used as the main component of the Fe-group-based alloy (iron-based alloy) soft magnetic powder. The soft magnetic powder is produced by adding a small amount of Nb (0.05-4 wt %) or V, Ta, Ti, Mo, or W, to the molten metal and by means of an inexpensive method such as the water-atomizing method.