How much is the surface energy of silicon nitride?
Best insight from top research papers
The surface energy of silicon nitride (Si3N4) has been measured to be 10–7 ± 0–8 J m−2. Dry and wet oxidation of the nitride was found to increase the surface energy from 8 mJ/m2 to more than 50 mJ/m2. The molecular dynamics simulation method was used to investigate the growth of silicon nitride films, and the Si(Nx) (x = 1–4) and N(Siy) (y = 1–3) bond configurations in the grown films were analyzed. The reaction of N2+ ions with the Si(100) surface was studied, and the position, width, and shape of the Si 2p band were explained in terms of different bonding configurations, denoting a Si atom with n nitrogen neighbors. The surface potential of GaN:Si was determined for Si doping, and the surface potential was found to decrease with increasing carrier concentration from about 1.6 eV down to 0.2 eV.
Answers from top 5 papers
More filters
| Papers (5) | Insight |
|---|---|
| The provided paper does not mention the surface energy of silicon nitride. | |
27 Citations | The surface energy of silicon nitride was measured to be 10-7 ± 0-8 J m-2 in both as-sintered and annealed specimens. |
| The provided paper does not mention the surface energy of silicon nitride. | |
5 Citations | The provided paper is about the determination of the surface potential of GaN:Si, and it does not provide information about the surface energy of silicon nitride. |
| The surface energy of silicon nitride is increased from 8 mJ/m2 to more than 50 mJ/m2 after dry and wet oxidation, according to the paper. |
Related Questions
What parameters have been optimized in silicon nitride balls polishing?4 answersThe parameters that have been optimized in silicon nitride balls polishing include rotation speeds, eccentricities, machining gaps, workpiece linear velocity, grinding wheel linear velocity, grinding wheel oscillation velocity, and feed velocity. These parameters were investigated and adjusted to improve the surface finish of the silicon nitride balls and achieve the desired surface roughness. The optimization of these parameters was done through experimental testing and the use of analytical models to analyze the kinematics of the polishing process. The results showed that by adjusting these parameters, the surface roughness of the silicon nitride balls could be significantly improved, leading to higher precision and quality in the machining process.
What parameters have been investigated in the field of optimization of polishing of silicon nitride balls?5 answersThe parameters investigated in the field of optimization of polishing of silicon nitride balls include NH3 flow rate.
What is the application and importance of polishing silicon nitride balls?5 answersPolishing silicon nitride balls is important for various applications. Silicon nitride is used as an orthopedic biomaterial for interbody fusion devices and joint replacements, and the production of complex shapes through conventional mechanical machining is difficult and expensive. Additionally, silicon nitride layers can be used as substrates for microarray technology, and chemical mechanical polishing (CMP) can improve the fluorescent intensity of microarray spots, leading to improved discrimination of low expressing genes. Furthermore, silicon nitride balls are used in hybrid bearing applications, and magnetic float polishing (MFP) technology can be used to finish large size/large batch silicon nitride balls. The finishing methodology involves mechanical polishing followed by chemo-mechanical polishing, resulting in high accuracy, geometric alignment, and improved surface finish and sphericity. The wear rate of silicon nitride can also be influenced by different counterface materials and abrasive particle concentrations, highlighting the importance of surface finishing for engineering ceramic components.
How about silicon nitride hip joint?5 answersSilicon nitride hip joints have been studied extensively and show promising results. They are made of silicon nitride ceramic materials, which provide excellent bioceramic implant properties along with high hardness, bending strength, fatigue strength, and fracture toughness. The hip joints also have good friction performance, bone growth capability, anti-infection capability, and developability. The outer peripheral surface of the acetabular cup and the surface of the femoral stem part are provided with porous rough structures, enhancing biological fixation. The preparation method of silicon nitride ceramic hip joint ball head involves ball-milling raw materials and sintering, resulting in a product with better performance, wear resistance, and longer service life. Wear rates for polyethylene liners against silicon nitride femoral heads are consistent with reported literature, and wear of self-mated silicon nitride is essentially zero, making it a preferred choice for articulation against dissimilar counterface surfaces. Silicon nitride coatings are also being investigated as bearing surfaces for joint implants due to their low wear rate and good biocompatibility. Overall, silicon nitride is a strong candidate for advancing the state of care in patients undergoing joint replacement, with its unique set of properties and wear behavior.
Will silicon nitride layer be etched by TMAH solution?4 answersSilicon nitride can be etched by TMAH solution.
What si?2 answersThe International System of Units (SI) is a globally recognized system of measurement units that provides a clear and comparable way to express results of measurements. It is essential for trade, science, and sustainable development. The SI has recently undergone a redefinition, where the system is now defined in terms of seven reference constants. This redefinition aims to achieve long-term stability, consistency, and coherence of the system, and to create a formal framework that fosters the growth of science and technology. SI can also be seen as a perspective in knowledge management, particularly in the context of the SECI model. Systems intelligence (SI) is a certain kind of human intelligence based on a systems thinking perspective, and it can play a powerful role in each stage of the SECI process. The impending redefinition of the SI system of units might affect the understanding of students. However, alternative ways to introduce students to the redefined SI, such as suggesting a list of experiments for some units, can be explored. SI is closely related to but not identical with the former cgs, mks, and mksa systems of metric units. The SI is the basis of international trade and supports the global measurement quality infrastructure through national metrology institutes.