公开(公告)号：US20190070633A1

公开(公告)日：2019-03-07

申请号：US16178013

申请日：2018-11-01

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Asif MATIN ,  Necar MERAH

IPC: B05D5/08 ,  B05D3/14

Abstract: A superhydrophobic and self-cleaning surface including a substrate and a superhydrophobic layer. The superhydrophobic layer having a reacted form of octadecyltrichlorosilane. The octadecyltrichlorosilane is disposed on and crosslinked to a surface of the substrate via surface hydroxyl groups. The surface exhibits a rms roughness of 40 nm to 60 nm, a water contact angle of 155° to 180°, and a contact angle hysteresis of less than 15°. A method of preparing the substrate with a superhydrophobic and self-cleaning surface including treating a substrate with a plasma treatment, contacting the substrate with water or an alcohol to form an hydroxylated substrate, contacting the hydroxylated substrate with a solution of octadecyltrichlorosilane in an alkane solvent at a concentration in the range of 0.05 M to 0.3 M, and drying the solution on to the substrate under ambient air to form the superhydrophobic and self-cleaning surface on the substrate.

公开(公告)号：US20180318957A1

公开(公告)日：2018-11-08

申请号：US16038337

申请日：2018-07-18

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Zafar IQBAL ,  Abdelrahman N. SHUAIB ,  Necar MERAH ,  Nouari SAHEB

IPC: B23K20/12 ,  C22C27/04 ,  B22F9/14 ,  B22F9/04 ,  B23K103/04

CPC classification number: B23K20/1255 ,  B22F9/04 ,  B22F9/14 ,  B22F2009/043 ,  B23K2103/04 ,  C22C27/04

Abstract: A friction stir welding tool comprising a composite of a tungsten-rhenium alloy and hafnium carbide particles, wherein a crystallite size of the tungsten-rhenium alloy is no more than 100 nm, wherein the hafnium carbide particles are dispersed within the tungsten-rhenium alloy, a method of fabricating the friction stir welding tool, and a method of friction stir welding a metal joint using the tool. Various embodiments of the friction stir welding tool, the method of fabricating the tool, and the method of friction stir welding using the tool are provided.

公开(公告)号：US20170225195A1

公开(公告)日：2017-08-10

申请号：US15387142

申请日：2016-12-21

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Asif MATIN ,  Necar MERAH

IPC: B05D5/08 ,  B05D3/04 ,  B05D3/14

CPC classification number: B05D5/08 ,  B05D3/142 ,  B05D2201/00 ,  B05D2203/35

Abstract: A superhydrophobic and self-cleaning surface including a substrate and a superhydrophobic layer. The superhydrophobic layer having a reacted form of octadecyltrichlorosilane. The octadecyltrichlorosilane is disposed on and crosslinked to a surface of the substrate via surface hydroxyl groups. The surface exhibits a rms roughness of 40 nm to 60 nm, a water contact angle of 155° to 180°, and a contact angle hysteresis of less than 15°. A method of preparing the substrate with a superhydrophobic and self-cleaning surface including treating a substrate with a plasma treatment, contacting the substrate with water or an alcohol to form an hydroxylated substrate, contacting the hydroxylated substrate with a solution of octadecyltrichlorosilane in an alkane solvent at a concentration in the range of 0.05 M to 0.3 M, and drying the solution on to the substrate under ambient air to form the superhydrophobic and self-cleaning surface on the substrate.