Invited Speakers

Speaker 1

University of Twente, The Netherlands

Short Biography:
After his Masters on laser hardening, Matthijn the Rooij has done a PhD on the prediction of galling in deep drawing processes in the University of Twente. In he has obtained the Corus Research Award in 2000, issued by the Royal Dutch Scientific Society. Currently, he is an associate professor in the chair of Surface Technology and Tribology of the University of Twente in the Netherlands. In this role, he is responsible for the research theme ‘extreme environments’.

Invited Speech: The potential role of interfaces and surfaces in the reduction of energy consumption

At this moment, there is a lot of attention for alternative sources and alternative storage possibilities for (electrical) energy, but also for making more efficient use of energy. In both aspects, but in particular in the efficient use of energy, well designed and engineered surfaces and interfaces can play an important role.   This role is much broader than friction reduction, but is for example also related to the utilization of hybrid materials in light weight constructions as well as the reduction of maintenance on industrial installations. In this talk, the focus will be on several ways in which surfaces and interfaces can contribute to a more efficient use of energy and examples will be given of recent research in this area.

Speaker 2

Universiti Kebangsaan Malaysia, Malaysia

Short Biography:

Abu Bakar Sulong, PEng, earned his DEng in 2008 from Sejong University (South Korea). He is currently Associate Professor at the Department of Mechanical Engineering, UKM. His research interest is mainly in material processing of nanocomposite, polymer composite and powder injection molding (powder metallurgy). He has published more than 100 research journal and technical papers with citation nearly 600 with H-index of 14. He has been invited as invited speakers and keynotes at national and international conferences. He is also actively being reviewers for local and international journals. He also grants evaluator at national level. Beside research, he actively involves as programme external examiner for local universities and institutes.

Invited Speech: Powder injection moulding of hydroxyapatite/titanium alloy (TI6Al4V) composite

Fabrication of Hydroxyapatite (HA)/Ti6Al4V composite had been less reported in PIM due to difficulty in processing of two type materials (miss-match between ceramic and metal). However, bioactive properties of HA and ductility of Ti6Al4V is important characteristics for implant material. Therefore, the main objective of this work is to investigate the feasibility of fabrication HA and Ti6Al4V composite through the PIM process. Rheology properties were investigated by capillary rheometer. HA/Ti6Al4V composite feedstock was moulded by low-pressure injection moulding machine. High vacuum furnace was used to diffuse HA/Ti6Al4V brown part at sintering temperature from 1100°C to 1300°C. Homogenous micro porosities was observed on sintered part. Optimization of sintering parameters was performed based on Taguchi method in variation of sintering temperature, holding time, heating rate and cooling rate. Sintering temperature exhibited the most significant factor on the properties of sintered part. Resulted mechanical properties of sintered are nearly in range of mechanical properties of bone implant.  HA has partially decomposed into β-TCP, titanium oxide and CaTiO3 from XRD analysis. Based on the results of this work, it can be concluded that fabrication of HA/Ti6Al4V composite through MIM process is feasible and can be further use as bone implant material.

Speaker 3

Tsinghua University, China

Short Biography:

Guoxin Xie received his doctoral degree at Tsinghua University, China, in 2010, majoring in Mechanical Engineering. After that, he spent two years at State Key Laboratory of Tribology, Tsinghua University, China for postdoctoral research. From 2012 to 2014, he worked at Royal Institute of Technology, Sweden, for another two years’ postdoctoral research. Since 2014, he has worked at Tsinghua University as a Tenure-track Associate Professor. His research interests include solid lubrication, electric contact lubrication, thin film lubrication, etc. He has published more than 40 referred papers in international journals. He won several important academic awards, such as Chinese Thousands of Young Talents, the Excellent Doctoral Dissertation Award of China, and Ragnar Holm Plaque from KTH, Sweden.

 Invited Speech: Tunable lubricity of graphite intercalation compounds

 Lamellar compound (graphite, molybdenum disulfide, MoS₂, etc.) sheets are well known to have good tribological properties due to the weak van der Waals interactions between basal layer planes, which could allow easy shearing along the direction parallel to the planes. Theoretically, modifying the interaction forces between layers by intercalation of different chemical substances in the van der Waals gaps of lamellar compounds can be one of the effective ways. Representatively, graphite intercalation compounds (GICs) are a unique class of modified lamellar materials, in which the layer planes of the host graphite and the layers of intercalated atomic or molecular guests are stacked periodically. Nevertheless, very few works has been conducted for investigating the tribological properties of GICs. In order to test the feasibility of modifying the frictional behaviors of lamellar compounds by intercalating chemical substances in the layered gaps, several different tetraalkylammonium cations and ionic liquids (ILs) were chosen as the intercalation substances to synthesize GICs by constant potential reduction. Meanwhile, the microstructures and tribological properties of these GICs were characterized by using various analytical techniques, and a deep insight into the underlying mechanism of the tribological properties of GICs was also gained.

Speaker 4

Short Biography:

Jaharah is currently a professor at the Department of Mechanical and Material Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia. She obtained her BEng, MSc and PhD from Leeds Metropolitan University, UK, Warwick University, UK, and University of Malaya, Malaysia respectively. She is a corporate member of Institute of Engineer Malaysia (MIEM), a professional Engineer from Board of Engineer Malaysia (Ir) and a treasurer for Malaysian Tribology Society (MYTRIBOS). Her research interests are in machining process and tribology in manufacturing.

Invited Speech: Fabrication of dimple structure using machining process on metallic surface

Surface texture such as dimple structure can be produced through various processes like electrochemistry, electrolysis, laser and machining process. This paper presents the fabrication of dimple structure on metallic surface of aluminum alloy 6061-T6 using machining process of turning and milling. This fabrication is enabled with the aid of newly developed dynamic assisted tools for tuning and milling processes respectively. The dynamic assisted tool developed can produce various shapes and geometries of dimple structure in turning process (spherical, short drop and long drop), whereas for the milling process only circle shape can be produced. The range of sizes of dimple structures produced for width was 153 µm – 999 µm, length was 964 µm - 3261 µm), diameter was 15 - 30 µm), depth was 37 µm - 155 µm and area ratio was 2.7 - 13.8 %.These range of sizes, depths, area ratios and array produced were within the range obtained by previous researchers that would minimize the friction and wear for sliding mechanical components.

Speaker 5

 Short Biography:

Si Lina is the lecturer of School of Mechanical Engineering at Beijing Institute of Technology (BIT), which is a public university with a traditional focus on science and technology but developing into other areas such as management and humanities. She has focused extensively on understanding the fundamental mechanisms of adhesion, friction, and wear between surfaces in micro/nano-electromechanical systems (MEMS/NEMS) devices. Her recent research has focused on fabrication and the characterization of the mesoporous material. Dr. Si held an undergraduate degree from China University of Petroleum in 2006 and doctoral degree in Mechanical Engineering from Tsinghua University in 2012.

Invited Speech: Adhesion and friction properties of nanopatterned surfaces: Molecular dynamics simulation studies

 Surface morphology has been demonstrated to play a key role in the tribological properties of surfaces in a wide dimensional range, from the macro- to nanoscale. Therefore, topographical modifications are often used to fabricate nano-patterns on small-scale device’s surface to enhance its tribological performance. Although experimental studies have obtained many valuable results, the effect of nanopatterning on tribology has not been completely understood. The adhesion and friction properties of nanopatterned surfaces with varying widths and pitches has been investigated by molecular dynamics (MD) simulation method in this work. It is indicated that the adhesion force and friction force of nanopatterned surfaces decreased dramatically compared to bare Si surfaces. The decreased friction force of the nanopatterned surfaces is attributed to the lower intrinsic adhesion and real contact area. The influences of groove widths, pitches and depth on the adhesion force and friction force are also investigated. In our study, the influences of groove widths and pitches on adhesion and friction properties are more obvious than that of groove depth.