"Metals and Alloys" Metal PPT Courseware

Description

"Metals and Alloys" Metal PPT Courseware

learning target

1. Understand the physical properties of metals and the relationship between the properties and uses of substances

2. Understand the concepts of metal materials and alloys; understand alloys and their properties, and know several common alloys

3. Feel the close relationship between metal materials and the progress of human civilization

physical properties of some metals

Conductivity (based on the conductivity of silver being 100)

Silver Copper Gold Aluminum Zinc Iron Lead

100 99 74 61 27 17 7.9

Density/(g·cm-3)

Gold Lead Silver Copper Iron Zinc Aluminum

19.3 11.3 10.5 8.92 7.86 7.14 2.7

Melting point/℃

Tungsten Iron Copper Gold Silver Aluminum Tin

3410 1535 1083 1064 962 660 232

Hardness (based on the hardness of diamond being 10)

Chromium Iron Silver Copper Gold Aluminum Lead

9 4-5 2.5-4 2.5-3 2.5-3 2-2.9 1.5

1. Physical properties of metals

physical properties

Metallic luster

conductivity

thermal conductivity

Ductility

High density and high melting point

Solid at room temperature (except mercury)

Note: Most metals are silver-white, but Cu is purple-red and Au is yellow.

2. Alloy

1. Alloy: It is a substance with metallic properties formed by fusing a metal with other metals or non-metals.

How alloys are fused:

①Metal and metal

②Metals and non-metals

③Metals and metals, non-metals

An alloy is a mixture.

2. Advantages of alloys: Compared with the metals they are composed of, alloys have increased hardness and lower melting points. Some alloys also have properties such as high strength and corrosion resistance.

3. Common alloys:

Pig iron (Fe, C) Steel (Fe, C) Stainless steel (Fe, Cr, Ni)

Brass (Cu, Zn) Bronze (Cu, Sn) Solder (Sn, Pb)

18K gold (Au, Ag, Cu) Aluminum alloy (Al, Cu, Mg, Si)

In-person testing

1. Which of the following is not an alloy ( )

A. Pig iron B. Stainless steel

C. Iron tetroxide D. Ductile iron

2. Which of the following comparisons is correct ( )

A. Carbon content: pig iron > steel B. Iron content: pig iron > steel

C. Content in the earth's crust: Alsteel

3. Aluminum alloy is used to make doors and windows ( )

A. Not easy to corrode B. High hardness

C. Lower melting point D. Good thermal conductivity

4. The main cause of osteoporosis in the elderly is the lack of the following elements in human bones ( )

A.Ca B.Na

C、Fe D、K

5. The alloy definitely contains _____ elements and may contain _____ elements. (Such as silicon, carbon, sulfur, etc.).

6. Pig iron is an iron alloy formed by heating and fusing _____, _____, silicon and manganese, so the alloy is a _____.

A. Mixture B. Pure substance C. Compound D. Element

7. Compared with iron, what are the superior properties of aluminum? (Considered from melting point, hardness, density, strength, electrical conductivity, thermal conductivity and corrosion resistance)

Answer: Aluminum has a low density, better electrical conductivity and stronger corrosion resistance; aluminum can also form alloys with other metals with various excellent properties.

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For more information about the "Metals, Metals and Alloys" PPT courseware, please click on the Metal ppt Metals and Alloys ppt tab.

"Metals and Alloys" Metal PPT Courseware 2:

"Metals and Alloys" Metal PPT Courseware 2 Learning Objectives 1. Understand common metal materials 2. Understand the meaning and properties of alloys 3. Master several common alloys Platinum has good ductility and can be extracted into fine pieces with a diameter of only 1/5000� Silk; Gold has good malleability and can be pressed into thick...

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Update Time: 2024-09-08

This template belongs to Chemistry courseware Beijing Curriculum Reform Edition Ninth Grade Chemistry Volume 2 industry PPT template

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