Which of the following will increase the strength of a sample of 90% SiO2 - 10% MgO
what's on the list?
Quench the entire sample in water
Quench half of the sample in water
Cool the entire sample with air jets
Cool half the sample with air
Submerge the sample in a salt bath of Na2O
Submerge the sample in a salt bath of CaO
A, C & F
To determine which of the following options will increase the strength of a sample of 90% SiO2 - 10% MgO, we need to consider the properties of these substances.
Silicon dioxide (SiO2) is a compound that is known for its high strength and hardness. On the other hand, magnesium oxide (MgO) has lower strength compared to SiO2 but offers other useful properties such as thermal stability and chemical resistance.
Now, let's consider the options:
1. Increasing the SiO2 content: Since SiO2 is already a high-strength substance, increasing its content in the sample is likely to improve its overall strength. Therefore, increasing the SiO2 content would indeed increase the strength of the sample.
2. Increasing the MgO content: While MgO does not possess the same level of strength as SiO2, increasing its content in the sample can improve other beneficial properties. However, in terms of increasing the overall strength, increasing the MgO content alone is not likely to have a significant impact.
3. Changing the fabrication process: The fabrication process can influence the strength of materials. By altering the process, such as adjusting the temperature or utilizing different techniques, it is possible to enhance the strength of the sample.
In conclusion, to increase the strength of a sample of 90% SiO2 - 10% MgO, the most effective approach would be to increase the SiO2 content. Additionally, optimizing the fabrication process can also contribute to improving the strength of the sample.