Materials science

There are both similarities and differences between the crystal structures and crystal chemistry of quartz, α-FePO4 and β-FePO4. One of the observed differences is that when the quartz is present at different temperatures. The α-FePO4 phase when present at low temperatures, tend towards the values obtained for β-FePO4 at high temperature. In addition, this case is true for all α quartz when at low temperature, in that it will tend to the values obtained for its respective β quartz experienced at…

Paragraph 1 Compare and contrast the crystal structures and crystal chemistry of quartz, α-FePO4 and β-FePO4. Haines’ research paper studies the change that occurs in the FePO4 structure as it is studied from temperatures 294K to 1073K. A transition is noticed at 980K, when it’s tetrahedral α-quartz structure experiences high pressure levels, changing the structure to β-phase, a more dense octahedral structure. Cell parameters of FePO4 in α-phase increases in cell parameters and volume as…

Small cracks, cavities, and notches in perfect material can dramatically reduce the tensile strength by producing stress concentration around them [ref]. We believe that in mammalian connective bone tissues, canaliculi, osteocyte lacunae, blood vessels and muscle insertions produce stress concentration to delay the progressive spread of minute cracks. Often times the cracks that are running against lacunae, for examples, stop on entering the lacunae, Hessian canals and blood vessels [ref]. We…

Properties; Beryllium is a toxic bivalent element; with a steel gray metallic look to it. Beryllium is also a durable, lightweight element. Primarily used as a hardening agent in alloys. It has one of the highest melting points of the light metals. With the atomic number of 4, and being classified within the group of alkaline earth metals. The element is nonmagnetic and resists oxidation when exposed to air at standard temperature and pressures. It’s also found in over 30 different minerals; for…

When it comes to selecting the right fastening devices for successful completion of a project, there are many factors to consider. However, once you have determined that screws are the best choice for the job, you will need to decide which type of screws will best serve your needs. Not only are there a number of screw sets available on the market, but each type of screw serves its own unique purpose. Screws shouldn't be mysterious; here are a few things that everyone should know about them.…

(Abiola). Before the tests, samples are cut into piece from the core with thickness about 1 in, and polished to make the top and bottom surfaces parallel. All tests are proceed on Nanovea Indenter perpendicular to the bedding direction. As natural material, the shale rock samples are not homogenous, so for each sample, at least 12 tests are done on the sample and averaged to get a result to be statistically correct. The indentation points are chosen carefully using the microscope before each…

Experiment 37: Friction Anne Smolinski as910513@ohio.edu Wednesday 11:50-1:40 TA: Sanjoy Sarkar November 11, 2017 Experiment 37: Technical Report ABSTRACT In experiment 37, the friction force is being explained and tested by using a block that is being pulled across a wooden base. Out of the four different types of friction, two will be tested during this experiment: (i) static and (ii) kinetic. Static friction can be defined as the force that resists motion of an object to a surface so…

attributing to the presence of ZIF-67 nanoparticles, acting as the crosslinkers, enhancing the interactions between the cellulosic molecular chains. The determination of mechanical properties under wet condition is of great significance to the paper-based materials. As shown in Fig. 3(C) and Table S3, the CP under wet condition had poor mechanical properties with tensile strength and elastic modulus of 0.15 and 22 MPa , respectively. In contrast, the CP/CNF showed favorable mechanical…

The purpose of this lab is to ascertain the hardness of two different materials. One material is aluminum the other will be determined through testing. Hardness is defined as a material’s ability to resist plastic deformation by indentation. Harder objects are more likely to resist deformation. The results of a hardness test will be important for engineers to determine what material will work best for a project. The material will need to hold up to any stress put on it and be able to work…

Moulding has more waste than when compared to other processes. To achieve the desired finish with Compression Moulding, the mould cavity is overfilled to some degree, in order to achieve the correct pressure to form the part correctly. Sometimes, excess material is used to push unwanted air out of the cavity, in order to have a void-free part. Another downside to this method, is that Compression Moulding does require a lot more manpower than some other methods being used. Therefore, there is a…