Materials can be broadly classified into two categories: metallic and non-metallic.
- Metallic materials: These are materials that are composed mostly of metal elements, such as iron, aluminum, copper, gold, and silver. They are typically characterized by high strength, ductility, and conductivity. They are widely used in construction, transportation, electrical and electronic industries, and many others.
- Non-metallic materials: These are materials that are not composed mostly of metal elements, such as ceramics, polymers, composites, and biomaterials. They have a wide range of properties and are used in a wide variety of applications.
a. Ceramic materials: These are inorganic, non-metallic materials that are characterized by their high hardness, high melting point, and excellent resistance to wear and corrosion. They are widely used in applications such as cutting tools, abrasives, and insulators.
b. Polymer materials: These are materials made from long chains of repeating molecular units. They are characterized by their low density, high flexibility, and good electrical insulation properties. They are widely used in applications such as packaging, textiles, and medical devices.
c. Composite materials: These are materials made by combining two or more different materials to achieve specific properties. They are characterized by their high strength-to-weight ratio and are widely used in aerospace, automotive, and construction industries.
d. Biomaterials: These are materials used in medical applications that interact with biological systems. They are used in devices such as artificial organs, implants, and prostheses.
This classification is not exhaustive, as there are many other types of materials, such as glasses, semiconductors, and smart materials, that are not included in these categories.
Did You Know : Top 15 Free Online Learning Platforms
-
Free Online Education Degrees : Coursera:
Coursera partners with universities and organizations worldwide to offer a wide range of courses. While many courses are free, a fee is often required for certification.
-
Free Online Education Degrees: edX:
Founded by MIT and Harvard, edX offers high-quality courses from top universities and institutions around the world. Certificates are available for a fee.
-
Free Online Education Degrees : Khan Academy:
Khan Academy provides free educational content in various subjects, especially mathematics and science, using instructional videos and practice exercises.
-
Free Online Education Degrees : Udacity:
Udacity focuses on tech-related courses and nanodegree programs, offering free content as well as more in-depth paid programs.
-
Free Online Education Degrees : MIT OpenCourseWare (OCW):
MIT OCW provides a vast array of MIT's course content for free, covering a wide range of disciplines.
-
Free Online Education Degrees : Harvard Extension School:
Harvard Extension School offers a selection of free online courses. While some courses are free, others may require payment for a certificate.
-
Free Online Education Degrees: Stanford Online:
Stanford Online offers a variety of free courses in different disciplines, including computer science, engineering, and business.
-
Best Free Online Courses : Carnegie Mellon Open Learning Initiative (OLI):
OLI offers free online courses and resources designed to improve learning outcomes through research-based methodologies.
-
Best Free Online Courses : FutureLearn:
FutureLearn partners with universities and institutions to offer a diverse range of free online courses. Certificates are available for a fee.
-
Best Free Online Courses: Alison:
Alison offers a wide range of free online courses, including diploma and certificate programs, covering various subjects.
-
Best Free Online Courses: Open Yale Courses:
Yale University provides free access to a selection of introductory courses through Open Yale Courses.
-
Best Free Online Courses : UC Berkeley Online:
UC Berkeley offers free online courses on a variety of subjects, ranging from computer science to humanities.
-
Best Free Online Courses : Google Digital Garage:
Google Digital Garage provides free courses on digital skills, including online marketing, data analysis, and more.
-
Best Free Online Courses : Codecademy:
Codecademy offers free coding courses, interactive exercises, and coding projects to help individuals learn programming languages.
-
Best Free Online Courses : LinkedIn Learning (formerly Lynda.com):
LinkedIn Learning provides a variety of video courses on professional development, technology, and creative skills. It offers a free trial period.