Mitsubishi Materials Corporation

and Technology, United States

Mitsubishi Materials Corporation

and Technology, United States
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Patent
Mitsubishi Materials Corporation | Date: 2017-02-01

A Ce-doped PZT-based piezoelectric film is provided which is formed of Ce-doped composite metal oxides represented by a general formula: Pb_(z)Ce_(x)Zr_(y)Ti_(1-y)O_(3). x, y, and z in the general formula satisfy a relationship of 0.005 x 0.05, a relationship of 0.40 y 0.55, and a relationship of 0.95 z 1.15, respectively. It is preferable that the hysteresis of the polarization quantity of the Ce-doped PZT-based piezoelectric film be shifted from the center of the hysteresis to a negative side by 4 kV/cm or more.


Patent
Mitsubishi Materials Corporation | Date: 2017-02-01

A rotary cutting tool including a polycrystalline diamond material of the invention includes: a tool body rotated about an axis with a carbide substrate made of cemented carbide and a flute provided at a tip portion thereof; a PCD layer sintered integrally with the carbide substrate, provided on an inside face of the flute facing in a rotation direction; and a cutting edge provided on the PCD layer to have the inside face as a rake face, in which a margin portion continuous with a rear side of the flute in the rotation direction is formed on an outer periphery of the tip portion, the cutting edge is formed at a ridge portion of the rake face, and a thickness of the PCD layer is 1/3 to 1 times a width of the margin portion.


Patent
Mitsubishi Materials Corporation | Date: 2017-02-08

According to an aspect of a drilling tool of the invention, the drilling tool includes a circular-cylindrical casing pipe (1); an annular ring bit (2) that is disposed at a leading end of the casing pipe so as to be coaxial with the casing pipe and rotatable around a central axis (O) of the casing pipe (1); and a pilot bit (4) that is inserted into the casing pipe (1) from a rear end side and has a leading end disposed at an inner peripheral part of the ring bit (2). The ring bit (2) is engaged with the pilot bit (4) in a rotational direction during drilling, and thereby is rotatable integrally with the pilot bit (4) around the central axis (O) and is locked to the leading end of the pilot bit (4) in a direction of the central axis (O). Drilling tips (5, 3) are mounted on the leading ends of the pilot bit (4) and the ring bit (2) so as to protrude therefrom, and drilling tips (5A) positioned at an outermost periphery of the pilot bit (4) and drilling tips (3A) positioned at an innermost periphery of the ring bit (2) overlap each other in a rotational trajectory around the central axis (O) during drilling.


Patent
Mitsubishi Materials Corporation | Date: 2017-04-05

A surface-coated cutting tool of the invention is a surface-coated cutting tool in which a hard coating layer that is composed of a lower layer and an upper layer is deposited on a surface of a tool body that is made of a WC-based cemented carbide or a TiCN-based cermet, (a) the lower layer has at least one Ti compound layer made of a TiCN layer, (b) the upper layer is made of an -type Al_(2)O_(3) layer, (c) in a case where, regarding Al_(2)O_(3) crystal grains of the entire upper layer, a constituent atom-sharing lattice point distribution is measured, a highest peak is present in 3, and a distribution ratio of 3 is 70% or more, and (d) a ratio of a 3-coincidence grain boundary continuing from an interface between the lower layer and the upper layer to an outermost surface of the upper layer is 60% or more of a 3-coincidence grain boundary of the upper layer. In addition, it is preferable that an outermost surface layer of the lower layer be made of an oxygen-containing TiCN layer, and in a case where an inclined angle frequency distribution is measured regarding the Al_(2)O_(3) crystal grains of the upper layer, a frequency ratio of the Al_(2)O_(3) crystal grains in an inclined angle division of 0 to 10 degrees be 70% or greater, and an area ratio of Al_(2)O_(3) crystal grains of the upper layer that have an aspect ratio of 5 or more be 80% or more.


Patent
Mitsubishi Materials Corporation | Date: 2017-03-22

A surface-coated cutting tool of the invention is a surface-coated cutting tool in which a surface of a tool body is coated with a lower layer and an upper layer, in which at least one layer of the lower layer is made of a TiCN layer, the upper layer has an average layer thickness of 2 to 15 m and is made of an Al_(2)O_(3) layer having an -type crystal structure in a chemically deposited state, and in a coincidence grain boundary distribution graph, a highest peak is present in 3 in the range of 3 to 29, a distribution ratio of 3 occupies 35 to 70% of the whole coincidence grain boundary length of 3 or more, and a coincidence grain boundary of 31 or more occupies 25 to 60% of the whole coincidence grain boundary length of 3 or more.


Patent
Mitsubishi Materials Corporation | Date: 2017-01-18

A copper ingot of the present invention which is casted by a belt-caster type continuous casting apparatus includes: 1 ppm by mass or less of carbon; 10 ppm by mass or less of oxygen; 0.8 ppm by mass or less of hydrogen; 15 ppm by mass to 35 ppm by mass of phosphorus; and a balance of Cu and inevitable impurities, and includes inclusions formed of oxides containing carbon, phosphorus, and Cu.


Patent
Mitsubishi Materials Corporation and Mitsubishi Materials Electronic Chemicals Co. | Date: 2017-02-01

A conductive paste includes: a silver-coated resin; and an organic vehicle that includes a thermosetting resin composition, a curing agent, and a solvent, in which the thermosetting resin composition is an epoxy resin composition which is solid at room temperature and has a melt viscosity of 0.5 Pas or lower at 150C, and a mass ratio of a content of the thermosetting resin composition to a content of the silver-coated resin is 10 to 40:60 to 90.


Patent
Mitsubishi Materials Corporation | Date: 2017-02-01

A composition used for forming a PZT-based piezoelectric film formed of Mn and Nb co-doped composite metal oxides is provided, in which the composition includes PZT-based precursors so that a metal atom ratio (Pb:Mn:Nb:Zr:Ti) in the composition satisfies (1.00 to 1.25):(0.002 to 0.056):(0.002 to 0.056):(0.40 to 0.60):(0.40 to 0.60), a rate of Mn is from 0.20 to 0.80 when the total of metal atom rates of Mn and Nb is 1, a rate of Zr is from 0.40 to 0.60 when the total of metal atom rates of Zr and Ti is 1, and the total rate of Zr and Ti is from 0.9300 to 0.9902 when the total of metal atom rates of Mn, Nb, Zr, and Ti is 1.


A liquid composition for forming a silica porous film of the invention is prepared by mixing a hydrolyzate of tetramethoxysilane or tetraethoxysilane as a silicon alkoxide with a silica sol in which fumed silica particles having primary particles having a mean particle diameter of 40 nm or less and secondary particles having a mean particle diameter of 20 nm to 400 nm, that is greater than the mean particle diameter of the primary particles, are dispersed in a liquid medium, in which the mass ratio (A/B) of the SiO_(2) content (B) of the silica sol to the SiO_(2) content (A) in the hydrolyzate is in a range of 1/99 to 60/40.


Patent
Mitsubishi Materials Corporation | Date: 2017-09-20

Provided is a coated tool which exhibits excellent wear resistance even in a case where carbon steel, alloy steel, high hardness steel, or the like is cut under high-speed cutting conditions with the generation of a high-temperature heat. In a surface-coated cutting tool in which a hard coating layer having a total layer thickness of 0.5 to 10 m is deposited on a surface of a tool body made of WC-based cemented carbide or TiCN-based cermet, the hard coating layer has an alternately laminated structure of A layers and B layers, in a case where the A layer is expressed by a composition formula: (Al_(a)Ti_(1-a))N (here, a is in atomic ratio), the A layer satisfies 0.50 a < 0.75, in a case where the B layer is expressed by a composition formula: (Al_(b)Ti_(1-b))N (here, b is in atomic ratio), the B layer satisfies 0.75 b 0.95, and when a layer thickness per layer of the A layers is represented by x (nm) and a layer thickness per layer of the B layers is represented by y (nm), 5y x 3y and 250 (nm) x + y 100 (nm) are satisfied.

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