Inorganic technology has been over for a while so it's about time I show off all the cool things I got from there.
This is my glas cutter. Its central piece is an Al
2O
3 ceramic piece that was used for a 4-point bending strength experiment.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiuiZ5uvE-uhU06aJA3WenzlonXvueXRd4PmeOdrIT-sg1u120-8jN8ZfHmtUsH1DNM_9oLQWENRTCIAJj3bJPPWD5MII3AnTKSEWc5St5-jm_VvL_0HcmyNJMq8Ar152jKXWQmUUCQksQ/s400/Keramik.jpg)
Its hardness is way above glass. That's why you can easily use it for scratching.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjBJ9t5t_ENTOtcvqf1Hofib7qF6t8CGAxdjQMfHM9uKo4N_McdN9VghAW0eG9i8dd-MLerAuSrjbMtFJs14TJ58NMiK9U-lAtQDpiE30WaGdcarrxBAOcHWqyEj_6QyaWP-ZCJ6P120DY/s400/Becherglas.jpg)
If you want more strength and you don't need quite as much hardness you move from ceramics to hardmetals.
This is a used indexable insert made of WC in a Co matrix. It's covered in TiN to give it a nice golden look (and maybe surface properties).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1WKso6ViKHm4Q7pWgR52BnaQY0vynNr2UM1YhFvRmc5dmmpFkQbeYvQoTtuMKhoYwryWPBTNORXXTsK4mYzgFNtU4foySVblpqz8XjrNr2np23lHfGkNvwcTDeTDPrb1oWdeeVs1nK2A/s400/Wendeschneidplatte.jpg)
It can be used for steel machining. And to produce mystery swarfs.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjkeaCBjfHF23npEa5dWaGuCCs2i8s6boS_BHtvu6RpEEZtsE9d0BRnoQ4qONHzvYqZckqP-Fn7B3MCy-F8S9D-m6eGEbKBjxB2zuKKLMpJzHHjU_1qKN5PXa7EoWEzl5fW1brXyAJZ6ME/s400/Span.jpg)
Why is it purple? It's plain steel but it's covered in a thin oxide layer that developed in the process of turning. The color is because of interference (like in an oil puddle).
Are there any hardmetals in everyday life? Yes, a ball point pen ball is typically made of a hardmetal. This is the only way to get the right porosity.
2 comments:
nice pictures :)
thanks, I did my best
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