Hydrophobic porous hard coating with lubricant, method for making and use of same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-005/18
B22F-007/00
C22C-001/04
C22C-001/08
C23C-030/00
B22F-005/00
출원번호
US-0858250
(2013-04-08)
등록번호
US-9358613
(2016-06-07)
발명자
/ 주소
Mukherjee, Somesh Kumar
Sista, Vivekanand
Stevens, John H.
출원인 / 주소
BAKER HUGHES INCORPORATED
대리인 / 주소
Cantor Colburn LLP
인용정보
피인용 횟수 :
0인용 특허 :
7
초록▼
A composite includes a porous matrix that includes a molybdenum-silicon-boron (Mo—Si—B) alloy that has a plurality of pores with a lubricant in contact with the Mo—Si—B alloy, a hydrophobic compound in contact with the Mo—Si—B alloy, or a combination thereof. A method for preparing a porous composit
A composite includes a porous matrix that includes a molybdenum-silicon-boron (Mo—Si—B) alloy that has a plurality of pores with a lubricant in contact with the Mo—Si—B alloy, a hydrophobic compound in contact with the Mo—Si—B alloy, or a combination thereof. A method for preparing a porous composite includes disposing a porous matrix comprising a Mo—Si—B alloy on a substrate, the Mo—Si—B alloy comprising a plurality of pores; disposing a lubricant on a surface of the porous matrix; and disposing a hydrophobic compound on a surface of the porous matrix to form the porous composite.
대표청구항▼
1. A composite comprising: a porous matrix having a molybdenum-silicon-boron (Mo—Si—B) alloy, the Mo—Si—B alloy having a plurality of pores and comprising one or more of the following: α-Mo; Mo3Si; Mo5SiB2; or Mo-20Si-10B; anda lubricant in contact with the Mo—Si—B alloy, a hydrophobic compound in c
1. A composite comprising: a porous matrix having a molybdenum-silicon-boron (Mo—Si—B) alloy, the Mo—Si—B alloy having a plurality of pores and comprising one or more of the following: α-Mo; Mo3Si; Mo5SiB2; or Mo-20Si-10B; anda lubricant in contact with the Mo—Si—B alloy, a hydrophobic compound in contact with the Mo—Si—B alloy, or a combination thereof;wherein the lubricant is a solid lubricant and comprises one or more of the following: indium; tin; antimony; germanium; zinc; copper; boron nitride; graphene; or carbon nanotube; and further wherein an amount of the plurality of pores in the porous matrix is from 5 vol % to 40 vol %, based on a total volume of the porous matrix, and the average pore size is greater than or equal to 1 micron; andwherein a strength of the composite is greater than or equal to 500 MPa at a temperature greater than or equal to 1000° C. 2. The composite of claim 1, further comprising a substrate. 3. The composite of claim 2, wherein the lubricant is disposed in a pore of the porous matrix, disposed on a surface of the porous matrix, disposed on a surface of the hydrophobic compound, disposed in the hydrophobic compound, or a combination thereof; and the hydrophobic compound is disposed in a pore of the porous matrix, disposed on a surface of the porous matrix, disposed on a surface of the lubricant, disposed in the lubricant, or a combination thereof. 4. The composite of claim 1, wherein the hydrophobic compound comprises a fluoropolymer comprising a repeat unit which comprises vinylidene fluoride, hexafluoropropylene, tetrafluoroethylene, chlorotrifluoroethylene, perfluoro(alkyl vinyl ether), perfluoro(ethyl vinyl ether), perfluoro(propyl vinyl ether), or a combination thereof. 5. The composite of claim 1, wherein Mo is present in the Mo—Si—B alloy in an amount from 70 at % to 98 at %, based on a total atomic amount of Mo, Si, and B; Si is present in the Mo—Si—B alloy in an amount from 2 at % to 25 at %, based on a total atomic amount of Mo, Si, and B; andB is present in the Mo—Si—B alloy in an amount from 1 at % to 15 at %, based on a total atomic amount of Mo, Si, and B. 6. The composite of claim 1, wherein the Mo—Si—B alloy is present in an amount from 30 wt % to 90 wt %, based on a total weight of the Mo—Si—B alloy, the lubricant, and the hydrophobic compound. 7. The composite of claim 6, wherein the lubricant is present in an amount from 5 wt % to 30 wt %, and the hydrophobic compound is present in an amount from 0 wt % to 70 wt %, based on a total weight of the Mo—Si—B alloy, the lubricant, and the hydrophobic compound. 8. The composite of claim 1, wherein a thickness of the porous matrix (Mo—Si—B) is from 20 μm to 200 μm. 9. The composite of claim 1, wherein the composite is resistant to oxidation at a temperature greater than or equal to 1200° C. 10. The composite of claim 1, wherein the composite is a downhole tool comprising a drill bit, cutter, tubular, slip, cable, housing, or seal. 11. The composite of claim 1, wherein the Mo—Si—B alloy is present in an amount from 40 wt % to 90 wt %, the lubricant is present in an amount from 5 wt % to 30 wt %, the hydrophobic compound is present in an amount of 5 wt % to 30 wt %, each based on a total weight of the Mo—Si—B alloy, the lubricant, and the hydrophobic compound. 12. A method for preparing a porous composite, the method comprising: disposing a porous matrix comprising a molybdenum-silicon-boron (Mo—Si—B) alloy on a substrate, the Mo—Si—B alloy comprising a plurality of pores and comprising one or more of the following: α-Mo; Mo3Si; Mo5SiB2; or Mo-20Si-10B;disposing a lubricant on a surface of the porous matrix; anddisposing a hydrophobic compound on a surface of the porous matrix to form the porous composite;wherein the lubricant is a solid lubricant and comprises one or more of the following: indium; tin; antimony; germanium; zinc; copper; boron nitride; graphene; or carbon nanotube; and further wherein an amount of the plurality of pores in the porous matrix is from 5 vol % to 40 vol %, based on a total volume of the porous matrix, and the average pore size is greater than or equal to 1 micron; andwherein a strength of the composite is greater than or equal to 500 MPa at a temperature greater than or equal to 1000° C. 13. The method of claim 12, further comprising: heating the porous composite;flowing the lubricant in the plurality of pores; andflowing the hydrophobic compound in the plurality of pores. 14. The process of claim 12, further comprising: contacting Mo—Si3N4 with BN; andforming a plurality of grains of the Mo—Si—B alloy;heating the plurality of grains; andconsolidating the plurality of grains by applying pressure to produce a Mo—Si—B alloy compact,wherein disposing the porous matrix on the substrate comprises: removing a portion of the Mo—Si—B alloy; anddepositing the Mo—Si—B alloy on the substrate to form the porous matrix. 15. The process of claim 12, further comprising: consolidating a powder of the Mo—Si—B alloy; andsintering the powder to produce a Mo—Si—B alloy compact,wherein disposing the porous matrix on the substrate comprises: removing a portion of the Mo—Si—B alloy; anddepositing the Mo—Si—B alloy on the substrate to form the porous matrix. 16. The method of claim 12, wherein the lubricant is a solid lubricant having a melting temperature greater than or equal to 150° C. 17. The method of claim 12, wherein the hydrophobic compound comprises a fluoropolymer; the lubricant comprises a transition metal or post-transition metal; andSi and B are present in the Mo—Si—B alloy in an amount respectively from 7 at % to 12 at % of Si and from 9 at % to 14 at % of B, with a balance being Mo, based on the total atomic amount Mo, Si, and B in the Mo—Si—B alloy.
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