Seoul National University

Yonsei University

Lg Electronics Inc.

Korea Institute of Science and Technology

Korea Institute of Industrial Technology

Eun Soo Park

Hyun Seok Oh

Hye Jung Chang

Sang Jun Kim

Do Hyang Kim

Kook Noh Yoon

Ji Young Kim

Kooknoh Yoon

Jinwoo Kim

Won Tae Kim

Ju Yeon Lee

Sangjun Kim

Wook Ha Ryu

Chae Woo Ryu

Sang Bum Kim

Min Seok Kim

Il Hwan Kim

Dong Han Kim

Bumdong Sa

Hangjin Ban

Il-Hwan Kim

Dong Hyun Bae

Joungwook Kim

Wookha Ryu

Jin Kyu Lee

Geun Hee Yoo

Joon Seok Kyeong

Hwi Jun Kim

Byung Joo Park

Seong Hoon Yi

Je In Lee

Heh Sang Ahn

So Yeon Kim

Jong Hyun Na

Eun Young Jeong

Jin Yeon Kim

Jung Chan Bae

Men Hua

Jeong Won Yeh

Kyoung Jin Ku

Kyung-Jun Kim

Byoung Kwon Choi

Khurram Yaqoob

Disclosed is a gear including a resettable metallic glass. The gear of the present disclosure includes, as a base material, a resettable metallic glass, wherein the resettable metallic glass includes at least one metal element selected from each of (a) the group consisting of Ti, Zr, and Hf and (b) the group consisting of Fe, Co, Ni, Cu, and Zn, and further includes at least one metal element to maximize the complexity in the thermodynamic enthalpy of mixing among constituent elements, thereby including multiple resetting cores in various atomic-scale cluster forms in an amorphous matrix, leading to a structure with maximized structural complexity.

Resettable gears and manufacturing method therefor

Disclosed are a BCC dual phase refractory superalloy with high phase stability and a manufacturing method therefor, the alloy comprising one or more of Ti, Zr, and Hf as Group 4 transition metals, one or more of Nb and Ta as Group 5 transition metals, and Al, and having a structure of a BCC phase, wherein the BCC phase is composed of a disordered BCC phase and an ordered BCC phase, and wherein the ordered BCC phase is formed by allowing Al, which is a BCC phase forming element, to be soluted in an area of the BCC phase where the contents of the Group 5 transition metals are more than those of the Group 4 transition metals, so that the present disclosure provides a BCC dual phase refractory superalloy with high phase stability, characterized in that when a BCC dual phase with the ordered BCC phase and the disordered BCC phase separated from each other is formed by aging, the aging condition is precisely cont rolled through the apex temperature (T) of the BCC phase miscibility gap, expressed by (Equation 1) below.T(K)=881.4+331.7546.7893&#x2003;&#x2003;(Equation 1)(provided that, 0&#x2264;x&#x2264;1, 0&#x2264;y&#x2264;0.2, 0&#x2264;x+y&#x2264;1, and 0&#x2264;z&#x2264;1).

BCC dual phase refractory superalloy with high phase stability and manufacturing method therefore

The present invention relates to a coated insulated wire having improved heat dissipation properties, insulation properties, flame retardancy, and lightweight properties; and a method of manufacturing the same.

Composition for coating insulated wire comprising heat dissipation silicone elastomer compound having light shielding layer

Disclosed are a BCC dual phase refractory superalloy with high phase stability and a manufacturing method therefor, the alloy comprising one or more of Ti, Zr, and Hf as Group 4 transition metals, one or more of Na and Ta as Group 5 transition metals, and Al, and having a structure of a BCC phase, wherein the BCC phase is composed of a disordered BCC phase and an ordered BCC phase, and wherein the ordered BCC phase is formed by allowing Al, which is a BCC phase forming element, to be soluted in an area of the BCC phase where the contents of the Group 5 transition metals are more than those of the Group 4 transition metals, so that the present disclosure provides a BCC dual phase refractory superalloy with high phase stability, characterized in that when a BCC dual phase with the ordered BCC phase and the disordered BCC phase separated from each other is formed by aging, the aging condition is precisely controlled through the apex temperature (T) of the BCC phase miscibility gap, expressed by (Equation 1) below.(K)=881.4+331.7*+546.7*+893.0*(provided that, 0&#x2264;&#x2264;1, 0&#x2264;&#x2264;0.2, 0&#x2264;&#x2264;1, and 0&#x2264;&#x2264;1)&#x2003;&#x2003;(Equation 1)

A resettable alloy having a resetting mechanism introduced thereinto through simple resetting treatment, thereby prolonging the lifespan of materials, and a manufacturing method for the same are provided. The resettable alloy comprises a body-centered tetragonal(BCT)-face-centered cubic(FCC) dual structure comprising: BCT martensite phase matrix; and FCC austenite phase present within the matrix, wherein the FCC phase is formed by selective segregation of component elements and can be repetitively reset through metastable reversible phase transformation.

Resettable alloys and manufacturing method for the same

The present invention relates to an amorphous alloy having low frictional resistance and capable of improving abrasion resistance, a target made of the amorphous alloy, and a compressor comprising a layer of the amorphous alloy as a coating layer. According to the present invention, it is possible to secure high hardness and a low elastic modulus of the coating layer by controlling a microstructure having an amorphous phase as a primary phase by using Ti-based three-component to five-component amorphous alloys. As a result, it is possible to prevent the coating layer from being peeled off from a matrix or destroyed, and thus it is possible to achieve the effect of improving reliability or durability of a mechanical apparatus such as a compressor.

High performance solid lubricating titanium amorphous alloy

Disclosed is an entropy-controlled solid solution matrix BCC alloy having strong resistance to high-temperature neutron radiation damage. The entropy-controlled solid solution matrix BCC alloy includes three or more multicomponent main elements selected from the element group consisting of Zr, Al, Nb, Mo, Cr, V, and Ti selected based on a neutron absorption cross-sectional area and a mixing enthalpy. Each of the elements is included in an amount of 5 to 35 at %, and the entropy-controlled solid solution matrix BCC alloy is a BCC-structure solid solution matrix alloy in a medium-entropy to high-entropy state. In this invention, damage caused by neutron radiation is reduced, and entropy is controlled to thus ensure a solid solution matrix BCC structure having a slow diffusion speed, and accordingly, resistance to void swelling due to radioactive rays is high.

Entropy-controlled BCC alloy having strong resistance to high-temperature neutron radiation damage

A bi-continuous composite of a refractory alloy and copper, and a method for manufacturing the same, are provided. The method for manufacturing a bi-continuous composite of a refractory alloy and copper includes: providing an alloy melt swapping (AMS) precursor; providing a copper melt with a temperature in a range of 1085&#xb0; C. to 3410&#xb0; C.; immersing the AMS precursor into the copper melt; and removing the AMS precursor from the copper melt. The AMS precursor includes elements having positive and negative mixing enthalpy with copper, respectively. The AMS precursor into which the copper melt is diffused becomes a bi-continuous composite with a first phase formed from the copper and a second phase formed from the AMS precursor.

Bi-continuous composite of refractory alloy and copper and method for manufacturing the same

The present invention relates to a HEA foam prepared by selective dissolution of a second phase within a two-phase separating alloy comprising the HEA and a manufacturing method thereof. The manufacturing method of the HEA foam of the present invention has the effect of preparing a novel HEA foam, which was not available in the past, by leaving only a first phase after manufacturing a two-phase separating alloy comprising a first phase by HEA, wherein at least 3 metal elements act as a common solvent. Furthermore, the HEA foam of the present invention has a structure, wherein pores are distributed inside the HEA, in which at least 3 metal elements act as a common solvent. By adding a functional characteristic of low heat conductivity, etc., to the existing high strength characteristic of HEA, the HEA foam of the present invention can exhibit a complex effect by the combination of the two particular effects, thereby being capable of exhibiting excellent physical characteristics.

High-entropy alloy foam and manufacturing method for the foam

There are provided metallic glass matrix composites with controllable work-hardening capacity. In more detail, there are provided metallic glass matrix composite with controllable work-hardening capacity capable of having significantly excellent toughness due to a metastable second phase precipitated in-situ in a metallic glass matrix by polymorphic phase transformation during a solidification process without a separate synthetic process, and capable of controlling work-hardening capacity by measuring physical properties of a second phase and adjusting a volume fraction (V) of the second phase due to constant correlation between the physical properties (absorbed energy E, a phase transformation temperature T, or a hardness H) of a metastable B2 second phase precipated in the metallic glass matrix and the absorbed energy (E) by work-hardening per unit volume fraction of the second phase in the metallic glass matrix.

Metallic glass composites with controllable work-hardening capacity

The present invention relates to a high entropy alloy having more improved mechanical properties by controlling contents of additive elements in a NiCoFeMnCr 5-element alloy to control stacking fault energy, thereby controlling stability of a &#x3b3; austenite phase to control a transformation mechanism, wherein the stacking fault energy is controlled in a composition range of NiCoFeMnCr(a+b+c+d+e=100, 1&#x2264;a&#x2264;50, 1&#x2264;b&#x2264;50, 1&#x2264;c&#x2264;50, 1&#x2264;d&#x2264;50, 10&#x2264;e&#x2264;25, and 77a&#x2212;42b&#x2212;22c+73d&#x2212;100e+2186&#x2264;1500), and thus, the &#x3b3; austenite phase exhibits a twin-induced plasticity (TWIP) property or a transformation induced-plasticity (TRIP) property in which the &#x3b3; austenite phase is subjected to phase transformation into an &#x3b5; martensite phase or an &#x3b1;' martensite phase, under stress, thereby having improved strength and elongation at the same time to have excellent mechanical properties.

High entropy alloy having TWIP/TRIP property and manufacturing method for the same

Provided is a Nd-based two-phase separation amorphous alloy by adding an element having a big difference in heat of mixing in a Nd-based alloy with a superior amorphous formability through an inherent characteristic of compositional elements and consideration of thermodynamics, at the time of forming amorphous phase, to thereby enable two-phase separation amorphous alloy during solidification. The Nd-based two-phase separation amorphous alloy is represented as a general equation Nd(TM)(D)wherein TM is a combination selected from A-B, A-C and B&#x2014;C when an element group of A consists of Y, Ti, Zr, La, Pr, Gd and Hf, an element group of B consists of Fe and Mn, and an element group of C consists of Co, Ni, Cu and Ag, wherein the content of the element group which constitutes the combination is 5 atomic weight % or greater, and the element selected from each of the element group is at least one element, and the content of one element selected from each of the element group does not exceed 50 atomic weight %, wherein the content of the element group of B is less than that of the element group of C when TM is a B&#x2014;C combination, and wherein D is at least one selected from the group consisting of Al, B, Si and P, and a and b have the range of 20&#x2266;a&#x2266;70, 5&#x2266;b&#x2266;30, and a+b&#x2267;40 in terms of atomic weight %.

Nd-based two-phase separation amorphous alloy

Disclosed is a magnesium based amorphous alloy having a good glass forming ability and ductility. The Mg based amorphous alloy has a composition range of MgABwhere x and y are respectively 2.5&#x2266;x&#x2266;30, 2.5&#x2266;y&#x2266;20 in atomic percent. Here, A includes at least one element selected from the group consisting of Cu, Ni, Zn, Al, Ag, and Pd, and B includes at least one element selected from the group consisting of Gd, Y, Ca, and Nd.

Magnesium based amorphous alloy having improved glass forming ability and ductility

Disclosed is a single-phase amorphous alloy having an enhanced ductility. The single-phase amorphous alloy has a composition range of ABCwhere a and b are respectively 0&#x3c;a&#x3c;15, 0&#x2266;b&#x2266;30 in atomic percent. Here, A includes at least one element selected from the group consisting of Be, Mg, Ca, Ti, Zr, Hf, Pt, Pd, Fe, Ni, and Cu. B includes at least one element selected from the group consisting of Y, La, Gd, Nb, Ta, Ag, Au, Co, and Zn. C includes at least one element selected from the group consisting of Al, In, Sn, B, C, Si, and P.

Monolithic metallic glasses with enhanced ductility

Disclosed is a quasicrystalline phase-reinforced Mg-based metallic alloy with high warm and hot formability, and making method thereof. The metallic alloy comprises a composition of Mg&mdash;1&tilde;10 at % Zn&mdash;0.1&tilde;3 at % Y, in which a two-phase region consisting of a quascrystalline phase and a magnesium-based solid solution phase exists. Constituting a matrix structure, the Mg-based solid solution phase (&agr;&mdash;Mg) is formed as a primary solid phase upon solidification. The quasicrystalline phase serves as a second phase and forms, together with the Mg-based solid solution phase, a eutectic phase, thereby reinforcing the matrix. The materials obtained through the hot rolling or extrusion of the cast alloy have an increased volume % of the second phase and thus show significantly increased strength.

Quasicrystalline phase-reinforced Mg-based metallic alloy with high warm and hot formability and method of making the same

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Gyeonggi-do, South Korea

Eun Soo Park