Aluminium nitride (AlN) is a functional ceramic which has several properties, and it is applied to substrate materials and fillers for packaging materials of electronic devices. Microwave heating has characteristics such as internal heating, rapid heating and selective heating, so it is useful for sy...

We identified the etiologies of early failures of hard-on-hard bearing surfaces for ceramic-on-ceramic and metal-on-metal THAs. We retrospectively reviewed records of 2907 THAs with hard-on-hard bearing surfaces implanted between 1996 and 2009; 1697 (58%) had ceramic-on-ceramic and 1...

Steel–ceramic composites offer a high potential as protective layers of mechanically and abrasively highly loaded parts. However, the machining of steel–ceramic composites is a great challenge for the process design due to the very different mechanical properties of the brittle ceramic particles...

We have prepared Ca–doped PbTiO3 of general formula Pb1–xCaxTiO3 with x = 0.00, 0.1 and 0.3. The polycrystalline ceramic samples of these materials have been prepared by standard solid state reaction method using high purity oxides and carbonates. The formation of compounds has been checked by X...

The present paper investigates the laser micro–turning operation on cylindrical aluminium oxide (Al2O3) ceramic to study the influence of different process parameters namely, laser average power, pulse frequency, workpiece rotational speed, assist air pressure and Y feed rate on surface roughness (...

We vibrate the workpiece and control the motion of the tool, which is constrained by an aerostatic bearing and generated by a voice coil actuator. We use the voice coil to measure the force acting between tool and workpiece. We measure the tool displacement with an Eddy current sensor. Using the two...

Cobalt aluminate imparts blue colour and diverse demanded properties to glass composites. In this work, a new core–shell pigment based on kaolin as the core covered with a nano– and micron–sized surface layer of cobalt–magnesium aluminate comprising its shell was introduced to glass composite...

In order to investigate the influence of machining parameters on surface roughness in ultrasonic vibration mill–grinding of hot–pressed silicon nitride, the mechanism of the ultrasonic vibration mill–grinding is analysed. Kinematic analysis of abrasive grain indicates that grains and workpiece...

Ceramic materials are getting widely used in many engineering applications. These ceramic materials need to be ground to obtain desired dimensional accuracy and surface finish for engineering components. However, the ground ceramic components mostly contain surface/subsurface microcraks, temperature...

New materials usually require new manufacturing processes to create the final shape, with desired bulk and surface properties. The knowledge of the mode of material removal of these new materials in manufacturing is required for better understanding of material removal mechanism. In the present work,...