Advanced materials like AlTiC, sapphire and SiC are now commonly used in many devices. One popular area that they are applied in is read/write head sliders for computer hard drives. A major practical problem with the use of these materials is that they are extremely difficult to machine, and the advanced applications they are used in require precise tolerances for finished dimensions.
The small components are cut from larger wafers of material using systems that have constant feed speeds. However performance of the dicing blades degrades over time due to the deterioration of their surface conditions, i.e., dislodgment or dullness of abrasive grains, deformations and abrasion of the matrix material. This alters the grindability or cutting performance of the blades. A better understanding of the mechanisms governing grindability could be applied to producing better components machined from very hard materials.
A team of Japanese researchers, Takuya Adachi, Koji Matsumaru and Kozo Ishizaki, from Nagaoka University of Technology have developed a constant feeding-force system, which enables the grindability of a grinding wheel to be analysed. Under constant feeding-force system, the feeding speed alters during processing, which depends on the surface conditions of a grinding wheel, and indicates its grindability.
In this study, the theoretical grindability of dicing blades was estimated by establishing a new model for feeding speeds under constant feeding-force dicing systems. The model was evaluated by comparing empirical and theoretical dicing speeds for different abrasive grain sizes. The researchers were able to conclude that the grindability of dicing blades depends on the abrasive grains size, number and distribution on the surface of the dicing blade.
Dr. Ian Birkby | EurekAlert!
Novel sensors could enable smarter textiles
17.08.2018 | University of Delaware
Quantum material is promising 'ion conductor' for research, new technologies
17.08.2018 | Purdue University
New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference
Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...
Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.
Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...
17.08.2018 | Event News
08.08.2018 | Event News
27.07.2018 | Event News
17.08.2018 | Physics and Astronomy
17.08.2018 | Information Technology
17.08.2018 | Life Sciences