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Improved Thermal-Shock Resistance in Industrial Ceramics

posted by mrpg on Friday August 24 2018, @12:45PM   Printer-friendly
from the water-is-always-the-answer dept.

MrPlow writes:

Submitted via IRC for SoyCow4408

Ceramic materials are used in nuclear, chemical and electrical power generation industries because of their ability to withstand extreme environments. However, at high temperatures, ceramics are susceptible to thermal-shock fractures caused by rapid temperature-changing events, such as cold water droplet contact with hot surfaces. In a novel interdisciplinary approach, engineers report the use of a cheap, simple, water-repelling coating to prevent thermal shock in ceramics.

Source: Improved thermal-shock resistance in industrial ceramics

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  • (Score: 0) by Anonymous Coward on Friday August 24 2018, @09:58PM (5 children)

    by Anonymous Coward on Friday August 24 2018, @09:58PM (#726040)

    Well, is there an easy test to see if glass cookware is made of the good stuff or some lower quality substitute?

    As I understand it, the reason original Pyrex(tm) is good is because it has near zero thermal coefficient of expansion over the working temperature range. Thus thermal shock does not cause mechanical size changes. Same for the glass or ceramic used to make "counter that cooks" range tops.

    Does the good stuff have a different index of refraction that could be measured easily? Maybe some other easily measured property?

  • (Score: 1) by khallow on Saturday August 25 2018, @03:49AM (2 children)

    by khallow (3766) Subscriber Badge on Saturday August 25 2018, @03:49AM (#726137) Journal
    You already stated one such test. Expose your glassware to thermal stress of the sort you want it to survive.

    • (Score: 0) by Anonymous Coward on Saturday August 25 2018, @02:14PM (1 child)

      by Anonymous Coward on Saturday August 25 2018, @02:14PM (#726232)

      Wooosh -- the idea is to verify the type of glass before buying it.

      • (Score: 1) by khallow on Sunday August 26 2018, @03:26AM

        by khallow (3766) Subscriber Badge on Sunday August 26 2018, @03:26AM (#726438) Journal
        If the test isn't significantly cheaper than the glassware, then you're not saving any money that way. Plus you can always pool resources. If one person finds out that certain glass pots are useless, then a lot of other people don't need to replicate the test.

  • (Score: 3, Informative) by deimtee on Saturday August 25 2018, @09:19AM

    by deimtee (3272) on Saturday August 25 2018, @09:19AM (#726180) Journal

    The old good pyrex has a slight yellowish tinge to it. The new crap pyrex is blueish.
    Not sure if that is universal, and whether whoever is currently fucking the pyrex name is likely to wake up and start making yellow shit to make a few more dollars.

    --
    If you cough while drinking cheap red wine it really cleans out your sinuses.

  • (Score: 0) by Anonymous Coward on Saturday August 25 2018, @12:08PM

    by Anonymous Coward on Saturday August 25 2018, @12:08PM (#726213)

    The easy test is read the packaging and look for the word borosilicate.