scholarly journals Chemical Means of Surface Control. Surface Modification of CRT.

1998 ◽  
Vol 49 (9) ◽  
pp. 950-955
Author(s):  
Hirofumi KONDO
Keyword(s):  
Surface Modification ◽  
Control Surface ◽  
Surface Control

scholarly journals Control Issues of Digital Clay: Massive Hydraulic Actuator Array for Man-Machine Communication

2006 ◽  
Author(s):  
Haihong Zhu ◽  
Brittyn Paul ◽  
Wayne J. Book
Keyword(s):  
Control System ◽  
Control Surface ◽  
Control Algorithms ◽  
Hydraulic Actuator ◽  
Driving System ◽  
Surface Control ◽  
Specific Device ◽  
Funded Project ◽  
Machine Communication ◽  
And Control

Digital Clay is an NSF funded project for human machine communication through a tangible haptic surface actuated by fluid power. Digital Clay's hardware can be divided into three subsystems: massive actuator-sensor array, fluidic driving system, and control system. The main focus of this paper is on the control issues of the massive actuator array of Digital Clay. Categorized by the function of control algorithms, the control system can be further divided into three levels: cell control, surface control, and user application interface. Analysis and testing results of above introduced topics are provided based on a 5×5 actuator array prototype. Most of the topics discussed in this paper are widely applicable not just for this specific device.

scholarly journals Nanoscale Surface Modifications of Orthopaedic Implants: State of the Art and Perspectives

2016 ◽  
Vol 10 (1) ◽  
pp. 920-938 ◽  
Author(s):  
RMT Staruch ◽  
MF Griffin ◽  
PEM Butler
Keyword(s):  
Surface Modification ◽  
Surface Modifications ◽  
Orthopaedic Implant ◽  
Success Rates ◽  
Orthopaedic Implants ◽  
Future Directions ◽  
Surgical Interventions ◽  
Surface Control ◽  
Total Knee

Background:Orthopaedic implants such as the total hip or total knee replacement are examples of surgical interventions with postoperative success rates of over 90% at 10 years. Implant failure is associated with wear particles and pain that requires surgical revision. Improving the implant - bone surface interface is a key area for biomaterial research for future clinical applications. Current implants utilise mechanical, chemical or physical methods for surface modification.Methods:A review of all literature concerning the nanoscale surface modification of orthopaedic implant technology was conducted.Results:The techniques and fabrication methods of nanoscale surface modifications are discussed in detail, including benefits and potential pitfalls. Future directions for nanoscale surface technology are explored.Conclusion:Future understanding of the role of mechanical cues and protein adsorption will enable greater flexibility in surface control. The aim of this review is to investigate and summarise the current concepts and future directions for controlling the implant nanosurface to improve interactions.

Surface Modification of Zirconia (Y-TZP) Ceramics Induced by Pulsed Laser Machining

2015 ◽  
Vol 752-753 ◽  
pp. 481-484 ◽  
Author(s):  
Valery V. Kuzin ◽  
Stanislav Grigoriev ◽  
Mike Fedorov ◽  
Mike Portnoy ◽  
Victor Ermolin
Keyword(s):  
Surface Modification ◽  
Tetragonal Zirconia ◽  
Pulsed Laser ◽  
Scanning Speed ◽  
Control Surface ◽  
Zirconia Ceramic ◽  
Laser Machining ◽  
Attractive Alternative ◽  
Modification Process ◽  
Tetragonal Zirconia Polycrystal

Technological features of pulsed laser machining of yttriastabilized tetragonal zirconia polycrystal (Y-TZP) were studied. The connection between the laser power, scanning speed, laser beam steps and surface state of zirconia ceramic was established. The results of the research showed that pulsed laser machining of this material is an effective tool to control surface modification process and presents an attractive alternative to conventional techniques.

Ion Implantation as Surface Treatment for Osseointegration of Musculoskeletal Implants: From the Lab to the Clinic

2009 ◽  
Vol 1181 ◽  
Author(s):  
Iñigo Braceras ◽  
Jose Iñaki Alava ◽  
Roberto Muñoz ◽  
Miguel Angel De Maeztu
Keyword(s):  
Surface Modification ◽  
Ion Implantation ◽  
Control Surface ◽  
Implant Surface ◽  
Outermost Surface ◽  
Integration Improvement ◽  
Surface Modification Techniques ◽  
Ion Implanted

AbstractA key process in a successful treatment of patients with a great variety of musculoskeletal implants requires a fast, reliable and consistent osseointegration. Among the parameters that affect this process, it is widely admitted that implant surface topography, surface energy and composition play an important role.Different surface modification techniques to improve osseointegration have been proposed and tested to date, but most focus on microscale features, and few control surface modifications at nanoscale. On the other hand, ion implantation modifies the outermost surface properties in relation to the nanotopography, chemical and physical characteristics at nanoscale. The meta-stable surface that results from the treatment, affects the adsorption of bio-molecules in the very first stages of the implant placement, and thus the signaling pathway that promotes the differentiation and apposition of osteoblast cells.This study aimed at assessing the performance, in terms of osseointegration levels and speed, of ion implanted titanium made implants. The study included several in vitro and in vivo tests. The latter, comprised different insertion periods and both experimental and commercial implants as comparative surfaces. The final stage of the study included clinical trials in human patients.In each and every case, bone integration improvement of tested materials/implants was achieved for the CO ion implanted samples. Furthermore, contact osteogenesis was observed in the ion implanted samples, unlike the Ti control samples, where only distance osteogenesis occurred, being this potentially one of the reasons for their faster healing and osseointegration process.Finally, the use of ion implantation as a surface modification tool that allows for evaluating the effects of nanotopography and composition changes independently is presented.

Ante versus post-functionalization to control surface structures with superhydrophobic and superoleophobic properties

RSC Advances ◽  
2015 ◽  
Vol 5 (78) ◽  
pp. 63945-63951 ◽  
Author(s):  
Guilhem Godeau ◽  
Thierry Darmanin ◽  
Frédéric Guittard
Keyword(s):  
Surface Modification ◽  
Surface Structures ◽  
Control Surface ◽  
Post Functionalization

Here, we report the first use of the Staudinger–Vilarrasa reaction with perfluorinated surface modification.

Characterization of carbides in M50NiL

1991 ◽  
Vol 49 ◽  
pp. 606-607
Author(s):  
L. S. Lin ◽  
K. P. Gumz ◽  
A. V. Karg ◽  
C. C. Law
Keyword(s):  
Temperature Effects ◽  
Base Composition ◽  
Lattice Parameter ◽  
Control Surface ◽  
Carbide Formation ◽  
Particle Sizes ◽  
Low Carbon ◽  
Fee Structure ◽  
Heat Treated

Carbon and temperature effects on carbide formation in the carburized zone of M50NiL are of great importance because they can be used to control surface properties of bearings. A series of homogeneous alloys (with M50NiL as base composition) containing various levels of carbon in the range of 0.15% to 1.5% (in wt.%) and heat treated at temperatures between 650°C to 1100°C were selected for characterizations. Eleven samples were chosen for carbide characterization and chemical analysis and their identifications are listed in Table 1.Five different carbides consisting of M6C, M2C, M7C3 and M23C6 were found in all eleven samples examined as shown in Table 1. M6C carbides (with least carbon) were found to be the major carbide in low carbon alloys (<0.3% C) and their amounts decreased as the carbon content increased. In sample C (0.3% C), most particles (95%) encountered were M6C carbide with a particle sizes range between 0.05 to 0.25 um. The M6C carbide are enriched in both Mo and Fe and have a fee structure with lattice parameter a=1.105 nm (Figure 1).

Sign in / Sign up

Export Citation Format

Share Document