Tdk Corporation

Adv Antest Corporation

Canon Kabushiki Kaisha

Mitsubishi Heavy Industries Limited

Sony Corporation

Mayekawa Mfg. Co., Ltd.

Implant and Tissue Engineering Dental Network-tokyo, Limited Co

Eiji Kato

Chikara Ishizaka

Taeko Tsubokura

Yoshinori Fujikawa

Katsuo Sato

Masaaki Shibata

Yoshiyuki Hayashi

Akiyoshi Irisawa

Tomoyu Yamashita

Toyoaki Furukawa

Makoto Iwasaki

Masashi Miwa

Tetsuya Hidaka

Shigeki Nishina

Motoki Imamura

Hisao Miyake

Hidetake Kitaoka

Yuuji Yatomi

Koshi Hayakawa

Yoshinari Teramoto

Tomoaki Kawai

Masazumi Tanoura

Isao Kanada

Yuki Nagamine

Kenji Muta

Takuma Hayakawa

Tamotsu Ishiyama

Tadashi Aoki

Wakako Okawa

Shinichiro Asami

Nobuhiro Jingu

Hiroyuki Ono

Tadashi Yamakawa

Takashi Hirakawa

Minoru Danno

Yuichi Ogawa

Yoichi Kamei

Masatoshi Katsuki

Daishi Ueno

Hisao Nakagawa

Takashi Fujinaga

Yuuko Ujihara

Shinichiro Hayashi

Kodo Kawase

Yoshihiko Hayashi

Kazuomi Oishi

Shin Masuda

Tsuneyoshi Takagi

Akihiro Kohno

Akira Fukuno

Tomoko Maeda

Akihiro Masukawa

Akitomo Sasaki

Kazunori Shiota

Koji Mitake

Kazue Kaneko

Koutaro Fujimura

Naota Watanabe

Makoto Nakane

Yasutaka Kimura

Haruna Nakajima

Naoto Murata

Naoki Ohashi

Youichi Kazama

Tetsuya Sawatsubashi

Kageharu Moriyama

Tadaoki Narumiya

Chisato Tsukahara

Noriyoshi Takahota

Yoshio Hagura

Hirokazu Yamasaki

Kazumasa Kumo

Shinsaku Dobashi

Atsushi Fujiwara

Tasuku Fujiki

Provided is an alloy for R-T-B based rare earth magnet. 'R' is one or more of a rare earth element, 'T' is one or more of a transition metal element essentially including Fe or Fe and Co, and 'B' is boron. The alloy includes a single or a plural number of main phase (A), having a minimum length of 10 &#x3bc;m or more and a maximum length of 30 &#x3bc;m or more and 300 &#x3bc;m or less, in a cross section cut along a thickness direction of the alloy. The main phase (A) includes an RTB phase, and an area ratio of the main phase (A) to an entire cross section is 2% or more and 60% or less.

Alloy for R&#x2014;T&#x2014;B based rare earth sintered magnet and method for producing the R&#x2014;T&#x2014;B based rare earth sintered magnet

A lightning-resistance performance of a wind turbine blade is improved with a simple configuration or method. Provided is a wind turbine blade protection structure for protecting a wind turbine blade from lightning, including a protection layer including a conductive metal foil arranged so as to cover at least a part of a surface of the wind turbine blade. The protection layer includes an elongated portion extending in a blade longitudinal direction along a trailing edge of the wind turbine blade from a blade root of the wind turbine blade to a blade tip portion.

Wind turbine blade protection structure and method of forming the same

Provided is an R-T-B based permanent magnet including main phase grains including an RTB compound and a grain boundary. R is one or more rare earth elements essentially including Nd, T is Fe or Fe and Co and B is boron. the R-T-B based permanent magnet further includes X, Z and M. X is one or more selected from Ti, V, Zr, Nb, Hf and Ta, Z is one or more selected from C and N, M essentially includes Ga and further includes one or more selected from Al, Si, Ge, Cu, Bi and Sn. The grain boundary includes an XZ phase having a face-centered cubic structure.

R-T-B based permanent magnet

Provided is a motor including a permanent magnet, in which the permanent magnet includes a high temperature side permanent magnet part exposed to a high temperature inside the motor, and a low temperature side permanent magnet part exposed to a temperature lower than the high temperature inside the motor, and a coercive force of the high temperature side permanent magnet part is higher than the coercive force of the low temperature side permanent magnet part.

Motor containing a permanent magnet having high and low temperature side permanent magnet parts

Provided is an R-T-B based rare earth magnet. R is one or more rare earth elements, T is one or more transition metal elements essentially including Fe or Fe and Co, and B is boron. B content with respect to a total R-T-B based rare earth magnet is 0.80 mass % or more and 0.98 mass % or less. The R-T-B based rare earth magnet includes an RTBphase.

R-T-B based rare earth magnet

A method of repairing or reinforcing, or attaching an accessory part to a wind turbine blade includes: determining a criterion to be satisfied by a repair member including a reinforcing fiber and a UV curable resin, the criterion being an adhesion strength of the repair member relative to a base member of the wind turbine blade; determining a work condition including: dimensions of the repair member, the number of the layers of the reinforcing fiber in the repair member, and/or a fiber extension direction of the reinforcing fiber, based on a damage condition of a repair target portion of the wind turbine blade; placing the reinforcing fiber and UV curable resin on the repair target portion based on the determined work condition; and obtaining the repair member by curing the UV curable resin so that the adhesion strength of the repair member relative to the base member satisfies the criterion.

Method of repairing or reinforcing wind turbine blade, or attaching accessory part to wind turbine blade

The present invention provides a rare earth based magnet that inhibits the high temperature demagnetization rate even when less or no heavy rare earth elements such as Dy, Tb and the like are used. The rare earth based magnet according to the present invention includes RTB main phase crystal grains and grain boundary phases between adjacent main phase crystal grains. In any cross-section of the rare earth based magnet, when evaluating the circular degree of the main phase crystal grains with Wadell's Roundness A, the shape of the main phase crystal grains is controlled such that the Roundness A becomes 0.24 or more.

Rare earth based magnet

A motor includes a magnet and a coil. &#x3b1;2=[{(Br2&#x2212;Br1)/Br1}/(T2&#x2212;T1)]&#xd7;100&#x2265;0.11 and &#x3b1;3=[{(Br3&#x2212;Br1)/Br1}/(T3&#x2212;T1)]&#xd7;100&#x2264;0.13 are satisfied. In the magnet, Br1 (mT) is a residual magnetic flux density at T1 (&#xb0; C.), Br2 (mT) is a residual magnetic flux density at T2 (&#xb0; C.), and Br3 (mT) is a residual magnetic flux density at T3 (&#xb0; C.), and &#x3b1;2 (%/&#xb0; C.) is a temperature coefficient at a target temperature of T2 (&#xb0; C.) with respect to a reference temperature of T1 (&#xb0; C.), and &#x3b1;3 (%/&#xb0; C.) is a temperature coefficient at a target temperature of T3 (&#xb0; C.) with respect to a reference temperature of T1 (&#xb0; C.) in conditions of T1=20, T2=100, and T3=220.

Motor

An R-T-B based sintered magnet has excellent corrosion resistance together with good magnetic properties. The R-T-B based sintered magnet contains RTB grains, wherein, an R&#x2014;Cu-M-C concentrated part is existed in a grain boundary formed between or among two or more adjacent RTB grains, and the concentrations of R (R is at least one from Sc, Y and the lanthanoide element), Cu, M (M is at least one from Ga, Si, Sn, Ge and Bi) and C in the R&#x2014;Cu-M-C concentrated part are higher than those in the RTB grains respectively.

R-T-B based sintered magnet and motor

The present invention provides an R-T-B based sintered magnet that inhibits the demagnetization rate at high temperature even when less or no heavy rare earth elements such as Dy, Tb and the like are used. The R-T-B based sintered magnet includes RTB crystal grains and two-grain boundary parts between the RTB crystal grains. Two-grain boundary parts formed by R&#x2014;Co&#x2014;Cu-M-Fe phase exist, and M is at least one selected from the group consisting of Ga, Si, Sn, Ge and Bi.

The present invention provides an implant body formed from metal or ceramics as a raw material, the implant body including a modified surface, provided with a plurality of projections and a plurality of crevasse-like nanoscale grooves, by which focal adhesion formation, penetration of collagen fibers, arrangement of the collagen fibers in a single direction to thereby adhere to connective tissue, and soft tissue sealablity are possible. According to such a surface modification, focal adhesion formation and the arrangement of the cell cytoskeleton can be enhanced, and penetration of collagen fibers into the surface internal portion is possible.

Implant body

The present invention provides a rare earth based magnet in which the demagnetization rate at a high temperature can be inhibited even if the amount of heavy rare earth element(s) such as Dy and Tb is evidently decreased compared to the past or no such heavy rare earth element is used. The rare earth based magnet of the present invention is a sintered magnet which comprises RTB crystal grains as the main phases and the crystal boundary phases among the RTB crystal grains. The microstructure of the sintered body is controlled by including crystal boundary phases containing at least R, T and M in the crystal boundary phases, wherein the relative atomic ratios of R, T and M are as follows, i.e., 25 to 35% for R, 60 to 70% for T and 2 to 10% for M.

The present invention provides an R-T-B based sintered magnet that inhibits the demagnetization rate at high temperature even when less or no heavy rare earth elements such as Dy, Tb and the like are used. The R-T-B based sintered magnet comprises RTB crystal grains and two-grain boundary parts between the RTB crystal grains. Two-grain boundary parts formed by a phase containing R, Cu, Co, Ga and Fe with a ratio of 40&#x2264;R&#x2264;70, 1&#x2264;Co&#x2264;10, 5&#x2264;Cu&#x2264;50, 1&#x2264;Ga&#x2264;15, and 1&#x2264;Fe&#x2264;40 (wherein, R+Cu+Co+Ga+Fe=100, and R is at least one selected from rare earth elements) exists in the magnet.

The present invention provides a rare earth based magnet that inhibits the high temperature demagnetization rate even when less or no heavy rare earth elements such as Dy, Tb and the like than before are used. The rare earth based magnet according to the present invention is a sintered magnet which includes RTB crystal grains as main phase and grain boundary phases between the RTB crystal grains. When the grain boundary phase surrounded by three or more main phase crystal grains is regarded as the grain boundary multi-point, the microstructure of the sintered body is controlled so that the ratio of the grain boundary triple-point surrounded by three main phase crystal grains in all grain boundary multi-points to be specified value or less.

The present invention provides a rare earth based magnet including RTB main-phase crystal grains, and two-grain boundary phases between adjacent two RTB main-phase crystal grains, the two-grain boundary phases are controlled such that the thickness thereof is 5 nm or more and 500 nm or less, and it is composed of a phase with a magnetism different from that of a ferromagnet.

Growing community of inventors

Tokyo, Japan

Eiji Kato