#Metals

[ggghoulish]

the Hermaeus Mora pendant and chain I made for metals class ! made from brass with sculpted polygel on the cover

[chasingrainbowsforever]

~ Copper Plated ~

[blue-nebraska]

and a fish buckle 🐟 made with sterling silver, nickel, and rainbow moonstones

[noosphe-re]

A pure (>99.95%) silver crystal, synthetic electrolytic made with visible dendritic structures. Weight ≈11g. this image was made from 12 single pictures via focus stacking (source)

[materialsscienceandengineering]

A research team at POSTECH (Pohang University of Science and Technology), led by Professor Hyoung Seop Kim from the Department of Materials Science and Engineering, Graduate Institute of Ferrous Technology, and Department of Mechanical Engineering, has developed a new alloy that maintains its strength and ductility across extreme temperatures ranging from -196 °C to 600 °C. The findings, which have drawn attention from the aerospace and automotive industries, were published in the international journal Materials Research Letters. Most metals used in everyday life are sensitive to temperature changes -- metal doorknobs feel icy in winter and scalding in summer. Consequently, conventional metal materials are typically optimized for performance within a narrow temperature range, limiting their effectiveness in environments with dramatic temperature fluctuations

Read more.

[slack-wise]

Maria Bartuszová

[geologyin-blog]

Over 99.999% of Earth’s gold is trapped in its core, slowly reaching the surface through volcanic activity.

Scientists from the University of Göttingen have uncovered Earth’s Core Leaks Gold to Surface via Hawaiian Volcanoes

[astrolovecosmos]

Aries is associated with the metal Iron, the metal of weaponry and tools, Aries forges ahead.

Taurus is associated with Copper. Copper is known for its warmth, beauty, and conductivity.

Gemini is associated with the metal Mercury, Mercury represents the volatile, fluid, and transformative aspect of the alchemical process. It is often associated with the mind, spirit, and principle of change and transition.

Cancer is associated with Silver and the popular and healing Copper. Silver is a metal known for its lustrous appearance, malleability, and association with the Moon. Silver has been revered for its purity and connection to the divine feminine.

Leo is associated with Gold, the metal of power, royalty, and luxury. The metal of the Sun.

Virgo is associated with Mercury and Copper, showing the multifaceted nature of the sign. Metals of flexibility, one associated with mental agility and the other healing properties.

Libra is associated with Copper; Copper is often seen as a symbol of balance and harmony in various cultures.

Scorpio is associated with Plutonium and Iron, a metal of destruction and a metal of war.

Sagittarius is associated with Tin. Tin is a highly malleable metal, known for its ability to be easily shaped and molded. It is also widespread, used globally in many things.

Capricorn is associated with Lead and Platinum. Lead is known for its heaviness, density, and stability... and poison. Platinum is known for its durability, strength, and resistance to corrosion.

Aquarius is associated with many metals: Lead, Platinum, Uranium, and Aluminum. Lead and Platinum reflect Saturn's serious and heavy influence on the sign. Uranium is a radioactive element known for its instability and transformative power. Aluminum is a lightweight, versatile metal known for its strength and conductivity.

Pisces is associated with Tin, the flexible metal that historically has been used to decorate or in the arts.

[mineralsrocksandfossiltalks]

Monday's Mineral: Nickel

Nickel is metal that has been known for thousands of years just like gold and silver. Pure nickel has a silvery-white color with a little bit of gold coloring thrown into the mix. It has a shiny, metallic luster (as all metals do) and is opaque. It has a hardness of 4, making it harder than both gold and silver. This means nickel can scratch both of those metals. Another really cool physical property is that nickel is ferromagnetic. This is very important.

Nickel is much more common than either gold or silver. It can be found in its pure elemental form or in mineral ores. Nickel ores include laterite, a type of soil deposit that changes composition depending on what minerals are present. They are typically rich in iron and aluminum which results in a rusty red color as the iron oxidizes. Laterite is formed in hot, wet, tropical areas.

Laterite deposits were the main source of nickel ores but that changed when nickel was found in sulfide deposits. Laterites that contain nickel are limonite (Fe, Ni)O(OH),

and garnierite (Mg,Ni)3Si4O10(OH)2·H2O (approximately, it varies A LOT)

Sulfide ores that contain nickel include pentlandite (Fe,Ni)9S8,

pyrrhotite (Fe9−xNixS8),

millerite (NiS),

and niccolite (NiAs).

Just like gold and silver, nickel has a face-centered cubic structure.

You'll also notice that in many ores, nickel is found alongside another metal: iron. These two metals are like the best of friends. In fact, the two metals are the main components of the Earth's inner and outer cores.

Because these two metals are ferromagnetic, they play a very important role in protecting our planet from dangerous solar energy. The outer core in liquid, and that liquid nickel/iron mixture creates the magnetosphere or the Earth's magnetic field. That magnetic field protects the Earth against solar winds that would strip our atmosphere from us. (Ask Mars, it's not a good deal). Thanks to that magnetosphere, we get some pretty spectacular light shows in the sky if you know where to look too.

Earth is not the only space object to contain a lot of nickel. Meteoric nickel (found with meteoric iron) makes up a vast number or meteorites.

Now, unlike gold and silver, nickel can actually prove to be toxic for us, so please, do not go out and lick or consume nickel products. Your body will not thank you.

Thanks for coming to learn about nickel! Tune in tomorrow for some polar trivia. Fossilize you later!

[materiallugy]

What is the difference between welding, brazing, and soldering?

A summary of the main points of difference between welding, brazing, and soldering are:

1. Temperature Range:

Welding: Above 1,200°C.

Brazing: From 450°C to 1,100°C.

Soldering: Below 450°C.

2. Strength of Joints:

Welding: Highest.

Brazing: Moderate.

Soldering: Lowest.

3. Applications:

Welding: Heavy-duty construction, automotive, aerospace.

Brazing: HVAC, electrical, automotive.

Soldering: Electronics, plumbing, jewelry.

4. Process complexity:

Welding: Requires high skill and complex equipment.

Brazing: Moderate skill and equipment.

Soldering: Low skill and simple equipment.

[chasingrainbowsforever]

~ Texture | Pattern | Design ~

[blue-nebraska]

chicken belt buckle 🐓🐓🐓 marriage of metals with bronze, copper, and brass findings

[noosphe-re]

Dendritic native silver crystals from Batopilas, Mexico https://www.le-comptoir-geologique.com/native-silver-encyclopedia.html

[materialsscienceandengineering]

What's your favorite metal (pure elemental as well as alloy)?

Terribly sorry, this got lost in my drafts and has been sitting there for months! Oops!

Great question, though, thanks!

I have a fondness for titanium and titanium alloys (Ti-6Al-4V), simply because that's what I have the most experience with, I know the microstructures it can form, processing methods, phase transformations, etc. So titanium is at the top of my list.

But, honorable mentions:

Cobalt. I really like cobalt blue. And cobalt is a cool element by itself.

I also really like tungsten. Not sure if it's the name/symbol combination, or if it's just the heaviest element I'm probably ever going to hold (I mean, there's gold, but, eh. Gold's more impressive for its non-reactivity.) in a decent size, or if it's all of tungsten's many "awards" (highest melting and boiling points). Or maybe I just think refractories are neat.

Gallium. Melts at/near room temperature. Liquid metals are cool.

Tin. Its near room temperature phase transition is really neat. Love to see it in person some day.

High entropy alloys. Also very neat.

But I'm going to cut this list off here before I start talking about reasons to love every possible metal/alloy.

(...do metallic glasses count as alloys? 😁)