Search Results - "Kwok, D. T. K."

Three-Dimensional Quasi-Direct-Current Plasma Immersion Ion Implantation Into Biomedical Nickel-Titanium Shape Memory Alloy Rod by Schulz, M., Kwok, D.T.-K., Tao Hu, Chu, P.K.

“…Near-equiatomic NiTi S-shape rods of 400 mm long, which are used for surgical correction of scoliosis, are treated by nitrogen plasma immersion ion…”
Get full text

Surface mechanical attrition treatment induced phase transformation behavior in NiTi shape memory alloy by Hu, T., Wen, C.S., Lu, J., Wu, S.L., Xin, Y.C., Zhang, W.J., Chu, C.L., Chung, J.C.Y., Yeung, K.W.K., Kwok, D.T.K., Chu, Paul K.

“…The phase constituents and transformation behavior of the martensite B19′ NiTi shape memory alloy after undergoing surface mechanical attrition treatment…”
Get full text

Effects of tube length and radius for inner surface plasma immersion ion implantation using an auxiliary electrode by Kwok, D.T.-K., Xuchu Zeng, Qingchuan Chen, Chu, P.K., Sheridan, T.E.

“…Plasma immersion ion implantation of the inner surface of a finite-length small cylindrical tube with a coaxial, grounded auxiliary electrode is modeled using…”
Get full text

Properties of titanium nitride fabricated on stainless steel by plasma-based ion implantation/deposition by Tian, X.B, Zeng, Z.M, Tang, B.Y, Fu, K.Y, Kwok, D.T.K, Chu, P.K

“…Plasma-based ion implantation (PBII) is a burgeoning surface treatment technique as it offers the possibility of treating complex-shaped and large samples…”
Get full text

Ion mean charge state in a biased vacuum arc plasma duct by Kwok, D.T.-K., Chu, P.K., Bilek, M.M.M., Brown, I.G., Vizir, A.

“…Vacuum arc or cathodic arc metal plasma sources are attractive and convenient for depositing high-quality thin metal films and metallurgical coatings. It is a…”
Get full text

Multiple-mode excitation in spin-transfer nanocontacts with dynamic polarizer by Wang, N., Wang, X. L., Qin, W., Yeung, S. H., Kwok, D. T. K., Wong, H. F., Xue, Q., Chu, P. K., Leung, C. W., Ruotolo, A.

“…We report our study on the emission response of a magnetic nanocontact with dynamic polarizer in perpendicular magnetic field. In this configuration three…”
Get full text

Numerical Simulation of Metal Plasma Immersion Ion Implantation and Deposition on a Dielectric Wedge by Kwok, D.T.-K.

“…Plasma immersion ion implantation (PIII) of a dielectric object is not straightforward to simulate because the surface will be charged during the process. The…”
Get full text

Numerical Simulation of Plasma Immersion Ion Implantation and Diffusion by KWOK, Dixon Tat-Kun

“…A numerical model is proposed to simulate plasma immersion ion implantation (PIII) and diffusion. The PIII process is modeled by the 1-D hybrid…”
Get full text

Comparison of oxidation resistance of copper treated by beam-line ion implantation and plasma immersion ion implantation by An, Quanzhang, Li, Liuhe, Hu, Tao, Xin, Yunchang, Fu, Ricky K.Y., Kwok, D.T.K., Cai, Xun, Chu, Paul K.

“…Copper which has many favorable properties such as low cost, high thermal and electrical conductivity, as well as easy fabrication and joining is one of the…”
Get full text

The importance of bias pulse rise time for determining shallow implanted dose in plasma immersion ion implantation by Kwok, D. T. K., Bilek, M. M. M., McKenzie, D. R., Chu, P. K.

“…The composition of the low-energy ions arising from the rise and fall time periods of the voltage pulse in plasma immersion ion implantation (PIII) are…”
Get full text

Numerical Simulation of Metal Plasma Immersion Ion Implantation (MePIIID) on a Sharp Cone and a Fine Tip by a Multiple-Grid Particle-in-Cell (PIC) Method by Tat-Kun Kwok, D., Cornet, C.

“…A multiple-grid particle-in-cell (PIC) method in r-z cylindrical coordinates is developed to study metal plasma immersion ion implantation and deposition…”
Get full text

Two-dimensional particle-in-cell plasma immersion ion implantation simulation of gear/windmill geometry in cylindrical co-ordinates along the ( r–θ) plane by Kwok, D.T.K, Fu, R.K.Y, Chu, P.K

“…Plasma immersion ion implantation (PIII) into gear/windmill structures is simulated by the particle-in-cell (PIC) method in cylindrical co-ordinates. In…”
Get full text

Two-dimensional particle-in-cell plasma immersion ion implantation simulation of gear/windmill geometry in cylindrical co-ordinates along the (r- theta ) plane by Kwok, D T K, Fu, R K Y, Chu, P K

“…Plasma immersion ion implantation (PIII) into gear/windmill structures is simulated by the particle-in-cell (PIC) method in cylindrical co-ordinates. In…”
Get full text

Interactions between plasma and ionization gauge in plasma immersion ion implantation by Tian, X.B., Fu, Ricky K.Y., Kwok, Dixon T.K., Chu, Paul K.

“…During plasma processes such as plasma immersion ion implantation-deposition (PIII-D), proper monitoring of the working gas pressure is essential as the…”
Get full text

Experimental investigation of electron oscillation inside the filter of a vacuum arc plasma source by Kwok, D. T. K., Zhang, T., Chu, P. K., Bilek, M. M. M., Vizir, A., Brown, I. G.

“…We report here experimental evidence of electron oscillation within the toroidal-section magnetic duct of a filtered vacuum arc plasma source. Our results…”
Get full text

Disturbance of a Langmuir probe at the steady-State sheath boundary in a drifting plasma by Kwok, D.T.K., Bilek, M.M.M., McKenzie, D.R., Oates, T.W.H., Chu, P.K.

“…The disturbance resulting from the presence of a positively biased Langmuir probe at an equilibrium steady-state ion sheath boundary in the drifting plasma is…”
Get full text

Ion dose uniformity for planar sample plasma immersion ion implantation : Special issue on plasma processing by KWOK, D. T.-K, CHU, P. K, CHUNG CHAN

Get full text

Surface hydrogen incorporation and profile broadening caused by sheath expansion in hydrogen plasma immersion ion implantation by Zhineng Fan, Xuchu Zeng, Dixon Tar-Kun Kwok, Chu, P.K.

“…Hydrogen plasma immersion ion implantation (PIII) in conjunction with ion-cut is an efficient and economical technique to synthesize silicon-on-insulator (SOI)…”
Get full text

Ion implantation into race surfaces of aerospace ball bearings in a plasma immersion configuration by Zhaoming Zheng, Chu, P.K., Xiubo Tian, Baoyin Tang, Dixon Tat-Kun Kwok

“…Plasma immersion ion implantation (PIII) is an effective technique to improve the surface properties of industrial components possessing an irregular shape,…”
Get full text

Influence of sample placement on the dose uniformity in plasma immersion ion implantation of industrial ball bearings by Zhaoming Zeng, Xiubo Tian, Dixon Tat-Kun Kwok, Baoyin Tang, Chu, P.K.

“…Plasma immersion ion implantation (PIII) is an effective technique to enhance the surface properties of industrial components possessing an irregular shape…”
Get full text