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Home » Authors » Debbie Aliya

Articles by Debbie Aliya

Debbie Aliya

The Beauty and Mystery of Minerals (part 1)

Debbie
Debbie Aliya
February 8, 2022
No Comments

When we are making use of a metallic object, we are not necessarily thinking about how the metal was extracted from its ore. Even if we do remember that the atoms that make up the metal object in question were once likely combined with oxygen or sulfur in a brittle (if not also hard) material, we might not take time to reflect on the beauty of the mineral forms. Yet taking the time to appreciate the natural world is beneficial to us as both simple humans and as people who work in a technology-influenced environment.


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Debbie Aliya

Diagnosing Rust on Heat-Treated Parts (part 3)

Debbie
Debbie Aliya
January 25, 2022
No Comments

The EDS can detect nitrogen (N), present in many cleaners; as well as carbon (present in many oils); oxygen (usually not terribly informative because it is in rust, some oils and many industrial grinding media); silicon (Si); and aluminum (Al), which can be present as abrasive residue or “dirt.” EDS can’t detect hydrogen (H), helium (He) or lithium (Li).


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Debbie Aliya

Diagnosing Rust on Heat-Treated Parts (part 2)

Debbie
Debbie Aliya
January 6, 2022
No Comments

Common substances that I find on stamped or machined parts are lubricants, cleaners and rust inhibitors. I do also sometimes find rust. But neither FTIR nor EDS can produce a firm diagnosis of “rust.” That’s because FTIR works best on carbon-based molecules, not ionic compounds (e.g., rust).


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Debbie Aliya

Diagnosing Rust on Heat-Treated Parts (part 1)

Debbie
Debbie Aliya
December 23, 2021
No Comments

As a local heat treater told me years ago, heat treating is great, but only do it when you need to. Because heat treating does not generally make the parts prettier or straighter.


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Debbie Aliya

Tooth Overlay Procedure: A Failure Analyst’s View (part 4)

Debbie
Debbie Aliya
December 2, 2021
No Comments

Here's the conclusion to Debbie Aliya's series on a tooth overlay procedure.


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Debbie Aliya

Tooth Overlay Procedure: A Failure Analyst’s View (part 3)

Debbie
Debbie Aliya
November 11, 2021
No Comments

On the subject of tooth damage, many of my teeth have gum-line grooves. A friend who is a retired dental technician insisted that gum-line grooves are a result of brushing horizontally and using an excessively hard toothbrush.


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Pyrite crystal
TECHNICAL TALK

Minerals: Their Beauty and Mystery

Debbie
Debbie Aliya
November 9, 2021
No Comments

Looking closely at an object and noticing its features and details is a good way to increase our creative powers. Following up on our curiosity is a good way to build a solid foundation of knowledge. Studying natural objects in this way is an excellent entrance to the world of scientific facts.


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Debbie Aliya

Tooth Overlay Procedure: A Failure Analyst’s View (part 2)

Debbie
Debbie Aliya
October 19, 2021
No Comments

After the X-ray seen in Figure 1 (see part 1), they put a little optical camera (pediatric size, for which I was grateful) in my mouth to obtain a 3-D digital model of the remaining tooth shape.


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Debbie Aliya

Tooth Overlay Procedure: A Failure Analyst’s View (part 1)

Debbie
Debbie Aliya
October 5, 2021
No Comments

Last month, my right rear-lower molar broke. As shown in Figure 1, the fracture event resulted in a chipped condition. The red arrows show the boundary (edge) of the missing piece.


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091621-Aliya-5

A Materials Engineering Vacation (part 3)

Debbie
Debbie Aliya
September 16, 2021
No Comments

Maybe a half a dozen times in my life I have learned something that, in a minute, totally transformed and rearranged everything I thought I knew about a subject that I thought I had previously understood.


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