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US 2017/0282287 A1Published application
Non-eutectic bonding
AssigneeTechni Holding AS
InventorsAndreas Larsson, Torleif A. Tollefsen
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Abstract
The present invention relates to a method of forming a joint bonding together two solid objects and joints made by the method, where the joint is formed by a layer of a binary system which upon heat treatment forms a porous, coherent and continuous single solid-solution phase extending across a bonding layer of the joint.
Claims28
A method for forming a joint between a bonding surface of a first solid object and a bonding surface of a second solid object, wherein the method comprises:
- A) providing a binary system of components A and B, where the binary system is either:
- i) a miscible binary system having an overall composition C0 within the range:
- C0=Cliq−fα(Cliq−Cα) where;
- Cliq is the composition of a liquid phase coexisting with a single-phased solid solution when the binary system is at a temperature
- T1=(Tliq.A+Tliq,B)/2,
- C60 is the composition of the a single-phased solid solution coexisting with the liquid phase when the binary system is at a temperature T1, Tliq,A is the melting temperature of 100% pure component A, Tliq,B is the melting temperature of 100% pure component B, and fα is the fraction of single-phased solid solution present in the miscible binary system at temperature T1,
- and where fα is the range of [0.26, 1), or
- ii) a partly miscible binary system having only three phase fields when being in its solid state region and which has either a hypoeutectic or a hypereutectic composition, wherein
- if the composition of the partly miscible binary system is hypoeutectic, the partly miscible binary system has an overall composition C0 in the range:
- C0=Cliq−fα(Cliq−Cα)
- where;
- Cliq is the composition of a liquid phase coexisting with an α-phase when the binary system is at a temperature T1=(Tliq,A+Teut)/2,
- Cα is the composition of the α-phase coexisting with the liquid phase when the binary system is at a temperature T1=(Tliq,A+Teut)/2,
- Tliq,A is the melting temperature of 100% pure component A,
- Teut is the eutectic temperature of the eutectic binary system, and
- fα is in the range of [0.26, 1),
- or wherein, if the composition of the partly miscible binary system is hypereutectic,
- the partly miscible binary system has an overall composition Co in the range:
- C0=fβ(Cβ−Cliq)+Cliq
- where;
- Cliq is the composition of a liquid phase coexisting with an β-phase when the binary system is at a temperature T1=(Tliq,B+Teut)/2,
- Cβ is the composition of the α-phase coexisting with the liquid phase when the binary system is at a temperature T1=(Tliq,B+Teut)/2,
- Tliq,B is the melting temperature of 100% pure component B,
- Teut is the eutectic temperature of the eutectic binary system, and
- fβ is in the range of [0.26, 1),
- B) forming a sandwiched structure comprising the first solid object, the binary system and the second solid object by facing the bonding surface of the second solid object towards the bonding surface of the first solid object, where the binary system is interposed between and made to contact the bonding surfaces of both the first and second objects, and
- C) forming the joint bonding the first and second objects by heat treating the sandwiched structure at a temperature, upwardly limited to temperature T1, which causes the miscible or partly miscible binary system of components A and B to form a porous, coherent and continuous structure of a single-phased solid solution of the A- and B-components being interposed between the bonding surfaces of both the first and second objects, and a second phase of the A- and B-components dispersed in the porous, coherent and continuous structure of a single-phased solid solution of the A- and B-components.
24 more elements
A method for forming a joint between a bonding surface of a first solid object and a bonding surface of a second solid object, wherein the method comprises:
- A) providing a binary system of components A and B, where the binary system is either:
- i) a miscible binary system having an overall composition C0 within the range:
- C0=Cliq−fα(Cliq−Cα) where;
- Chliq is the composition of a liquid phase coexisting with a single-phased solid solution when the binary system is at a temperature
- T1=(Tliq,A+Tliq,B(/2,
- Cα is the composition of the a single-phased solid solution coexisting with the liquid phase when the binary system is at a temperature T1,
- Tliq,A is the melting temperature of 100% pure component A,
- Tliq,B is the melting temperature of 100% pure component B, and
- fα is the fraction of single-phased solid solution present in the miscible binary system at temperature T1, and where fα is the range of [0.26, 1), or
- ii) a partly miscible binary system having only three phase fields when being in its solid state region and which has either a hypoeutectic or a hypereutectic composition, wherein
- if the composition of the partly miscible binary system is hypoeutectic, the partly miscible binary system has an overall composition Co in the range:
- C0=Cliq−fα(Cliq−Cα)
- where;
- Cliq is the composition of a liquid phase coexisting with an α-phase when the binary system is at a temperature T1=(Tliq,A+Teut)/2,
- Cα is the composition of the α-phase coexisting with the liquid phase when the binary system is at a temperature T1=(Tliq,A+Teut)/2,
- Tliq,A is the melting temperature of 100% pure component A,
- Teut is the eutectic temperature of the eutectic binary system, and
- fα is in the range of [0.26, 1),
- or wherein, if the composition of the partly miscible binary system is hypereutectic,
- the partly miscible binary system has an overall composition C0 in the range:
- C0=fβ(C=−Cliq)+Cliq
- where;
- Cliq is the composition of a liquid phase coexisting with an β-phase when the binary system is at a temperature T1=(Tliq,B+Teut)/2,
- Cβ is the composition of the β-phase coexisting with the liquid phase when the binary system is at a temperature T1=(Tliq,B+Teut)/2,
- Tliq,B is the melting temperature of 100% pure component B,
- Teut is the eutectic temperature of the eutectic binary system, and
- fα is in the range of [0.26, 1),
- B) forming a sandwiched structure comprising the first solid object, the binary system and the second solid object by facing the bonding surface of the second solid object towards the bonding surface of the first solid object, where the binary system is interposed between and made to contact the bonding surfaces of both the first and second objects, and
- C) forming the joint bonding the first and second objects by heat treating the sandwiched structure at a temperature, upwardly limited to temperature T1, which causes the miscible or partly miscible binary system of components A and B to form a porous, coherent and continuous structure of a single-phased solid solution of the A- and B-components being interposed between the bonding surfaces of both the first and second objects, and a second phase of the A- and B-components dispersed in the porous, coherent and continuous structure of a single-phased solid solution of the A- and B-components.
26 more elements
A joint between a bonding surface of a first solid object and a bonding surface of a second solid object, comprising a bonding layer made of a binary system of components A and B, wherein the binary system is either:
- i) a completely miscible binary system, having an overall composition C0 within the
- range:
- C0=Cliq−fα(Cliq−Cα) where;
- Cliq is the composition of a liquid phase coexisting with a single-phased solid solution when the binary system is at a temperature T1=(Tliq,A+Tliq,B)/2,
- Cα is the composition of the single-phased solid solution coexisting with the liquid phase when the binary system is at a temperature T1,
- Tliq,A is the liquidus temperature of 100% pure component A,
- Tliq,B is the liquidus temperature of 100% pure component B, and
- fα is in the range of [0.26, 1), or
- ii) a partly miscible binary system of either hypoeutectic or hypereutectic composition having only three phase fields in its solid state region,
- and if the composition of the partly miscible binary system is hypoeutectic,
- it has an overall composition C0 in the range:
- C0=Cliq−fα(Cliq−Cα) where;
- Cliq is the composition of a liquid phase coexisting with an α-phase when the binary system is at a temperature T1=(Tliq,A+Teut)/2,
- Cα is the composition of the α-phase coexisting with the liquid phase when the binary system is at a temperature T1=(Tliq,A+Teut)/2,
- Tliq,A is the melting temperature of 100% pure component A,
- Teut is the eutectic temperature of the eutectic binary system, and
- fα is in the range of [0.26, 1),
- or if the composition of the partly miscible binary system is hypereutectic,
- it has an overall composition C0 in the range:
- C0=Cliq−fβ(Cliq−Cα) where;
- Cliq is the composition of a liquid phase coexisting with an β-phase when the binary system is at a temperature T1=(Tliq,B+Teut)/2,
- Cβ is the composition of the β-phase coexisting with the liquid phase when the binary system is at a temperature T1=(Tliq,B+Teut)/2,
- Tliq,B is the melting temperature of 100% pure component B,
- Teut is the eutectic temperature of the eutectic binary system, and
- fβ is in the range of [0.26, 1),
- and further wherein
- the binary system of miscible or partly miscible components A and B comprises a porous, coherent and continuous structure of a single-phased solid solution of the A- and B-components being interposed between the bonding surfaces of both the first and second objects, and a second phase of the A- and B-components dispersed in the porous, coherent and continuous structure of a single-phased solid solution of the A- and B-components.
24 more elements
A joint between a bonding surface of a first solid object and a bonding surface of a second solid object, comprising a bonding layer made of a binary system of components A and B, wherein the binary system is either:
- i) a completely miscible binary system, having an overall composition C0 within the
- range:
- C0=Cliq−fα(Cliq−Cα) where;
- Cliq is the composition of a liquid phase coexisting with a single-phased solid solution when the binary system is at a temperature T1=(Tliq,A+Tliq, B)/2,
- Cα is the composition of the single-phased solid solution coexisting with the liquid phase when the binary system is at a temperature T1,
- Tliq,A is the liquidus temperature of 100% pure component A,
- Tliq,B is the liquidus temperature of 100% pure component B, and
- fα is in the range of [0.26, 1), or
- ii) a partly miscible binary system of either hypoeutectic or hypereutectic composition having only three phase fields in its solid state region,
- and if the composition of the partly miscible binary system is hypoeutectic,
- it has an overall composition C0 in the range:
- C0=Cliq−fα(Cliq−Cα) where;
- Cliq is the composition of a liquid phase coexisting with an α-phase when the binary system is at a temperature T1=(Tliq,A+Teut)/2,
- Cα is the composition of the α-phase coexisting with the liquid phase when the binary system is at a temperature T1=(Tliq,A+Teut)/2,
- Tliq,A is the melting temperature of 100% pure component A,
- Teut is the eutectic temperature of the eutectic binary system, and
- fα is in the range of [0.26, 1),
- or if the composition of the partly miscible binary system is hypereutectic,
- it has an overall composition C0 in the range:
- C0=fβ(Cβ−Cliq)+Cliq where;
- Cliq is the composition of a liquid phase coexisting with an β-phase when the binary system is at a temperature T1=(Tliq,B+Teut)/2,
- Cβ is the composition of the β-phase coexisting with the liquid phase when the binary system is at a temperature T1=(Tliq,B+Teut)/2,
- Tliq,B is the melting temperature of 100% pure component B,
- Teut is the eutectic temperature of the eutectic binary system, and
- fβ is in the range of [0.26, 1),
- and further wherein
- the binary system of miscible or partly miscible components A and B comprises a porous, coherent and continuous structure of a single-phased solid solution of the A- and B-components being interposed between the bonding surfaces of both the first and second objects, and a second phase of the A- and B-components dispersed in the porous, coherent and continuous structure of a single-phased solid solution of the A- and B-components.
24 more elements
Dependencies are inferred from the claim text.