Telescopic unit with dissolvable barrier
View Patent ↗A telescopic member includes, at least a central component and a barrier disposed within the central component, the barrier has a selectively tailorable dissolution rate curve and has structural properties enabling the containment of high pressure prior to structural failure of the barrier through dissolution.
1. A telescopic member comprising:
at least a central component; and
a barrier disposed within the central component, the barrier having a selectively tailorable corrosion rate curve and having structural properties enabling the containment of high pressure prior to structural failure of the barrier through corrosion,
wherein the barrier is constructed of a powder compact that comprises:
a substantially-continuous, cellular nanomatrix comprising a nanomatrix material;
a plurality of dispersed particles comprising a particle core material that comprises Mg, Al, Zn or Mn, or a combination thereof, dispersed in the cellular nanomatrix; and
a solid state bond layer extending throughout the cellular nanomatrix between the dispersed particles.
2. A telescopic member as claimed in claim 1 wherein the barrier comprises a selectively tailorable yield strength.
3. A telescopic member as claimed in claim 1 , wherein the nanomatrix material has a melting temperature (TM), the particle core material has a melting temperature (TDP); wherein the powder compact is sinterable in a solid-state at a sintering temperature (TS), and TS is less than TM and TDP.
4. A telescopic member as claimed in claim 1 , wherein the dispersed particles comprise Mg—Zn, Mg—Al, Mg—Mn, Mg—Zn—Y, Mg—Al—Si or Mg—Al—Zn.
5. A telescopic member as claimed in claim 1 , wherein the dispersed particles comprise an Mg—Al—X alloy, wherein X comprises Zn, Mn, Si, Ca or Y, or a combination thereof.
6. A telescopic member as claimed in claim 1 , wherein the dispersed particles further comprise a rare earth element.
7. A telescopic member as claimed in claim 1 , wherein the dispersed particles have an average particle size of about 5 μm to about 300 μm.
8. A telescopic member as claimed in claim 1 , wherein the dispersed particles have an equiaxed particle shape.
9. A telescopic member as claimed in claim 1 , further comprising a plurality of dispersed second particles, wherein the dispersed second particles are also dispersed within the cellular nanomatrix and with respect to the dispersed particles.
10. A telescopic member as claimed in claim 9 , wherein the dispersed second particles comprise Fe, Ni, Co or Cu, or oxides, nitrides or carbides thereof, or a combination comprising at least one of the foregoing elements, oxides, nitrides, or carbides.
11. A telescopic member as claimed in claim 1 , wherein the nanomatrix material comprises Al, Zn, Mn, Mg, Mo, W, Cu, Fe, Si, Ca, Co, Ta, Re or Ni, or an oxide, carbide or nitride thereof, or a combination of any of the aforementioned materials, and wherein the nanomatrix material has a chemical composition and the particle core material has a chemical composition that is different than the chemical composition of the nanomatrix material.
12. A telescopic member as claimed in claim 1 , wherein the cellular nanomatrix has an average thickness of about 100 nm to about 5 μm.
13. A telescopic member as claimed in claim 1 , wherein the powder compact is formed from a sintered powder comprising a plurality of powder particles, each powder particle having a particle core that upon sintering comprises a dispersed particle and a single metallic coating layer disposed thereon, and wherein the cellular nanomatrix between adjacent ones of the plurality of dispersed particles comprises the single metallic coating layer of one powder particle, the bond layer and the single metallic coating layer of another of the powder particles.
14. A telescopic member as claimed in claim 1 , wherein the powder compact is formed from a sintered powder comprising a plurality of powder particles, each powder particle having a particle core that upon sintering comprises a dispersed particle and a plurality of metallic coating layers disposed thereon, and wherein the cellular nanomatrix between adjacent ones of the plurality of dispersed particles comprises the plurality of metallic coating layers of one powder particle, the bond layer and plurality of metallic coating layers of another of the powder particles, and wherein adjacent ones of the plurality of metallic coating layers have different chemical compositions.
15. A telescopic member as claimed in claim 1 , wherein the dispersed particles comprise Mg and the powder compact has a room temperature compressive strength of at least about 37 ksi.
16. A telescopic member as claimed in claim 15 , wherein the dispersed particles comprise Mg and the powder compact has an actual density of about 1.738 g/cm 3 to about 2.50 g/cm 3 .
17. A telescopic member as claimed in claim 1 , wherein the dispersed particles comprise Mg and the powder compact has a room temperature shear strength of at least about 20 ksi.
18. A telescopic member as claimed in claim 1 , wherein the powder compact has a predetermined theoretical density and an actual density that is substantially equal to the predetermined theoretical density.
19. A telescopic member as claimed in claim 1 , wherein the particle core comprises Mg and the powder compact is selectably dissolvable at a rate of about 0 to about 7000 mg/cm 2 /hr.
20. A telescopic member comprising:
at least a central component; and
a barrier disposed within the central component, the barrier having a selectively tailorable material yield strength,
wherein the barrier is constructed of a powder compact that comprises:
a substantially-continuous, cellular nanomatrix comprising a nanomatrix material;
a plurality of dispersed particles comprising a particle core material that comprises Mg, Al, Zn or Mn, or a combination thereof, dispersed in the cellular nanomatrix; and
a solid state bond layer extending throughout the cellular nanomatrix between the dispersed particles.