Intro – An Introduction to Materials: Nature and Properties- Prof. Ashish Garg

ok so ah um this is a course on ah nature
ah introduction to materials ah basically we will be talking about nature and properties
of materials in this part the part one ah we will be looking at structure of materials
ah by structure i mean basically the the atomic structure and the crystal structure of materials
ah this is the twenty hours course ah which means you will have forty half an hour lectures
this is a course basically which requires a a background which is ah which could be
bsc in physics or chemistry or it could be bachelors in non materials in inter discipline
its even useful for masters students and a non materials background for example in masters
in engineering masters in mechanical engineering chemical engineering or masters in physics
so basically its it is suitable for all the students who have not had a ah um ah ah dedicated
course on materials ah looking at the structure and properties of materials so the course
will have ah the course will have basically fifty percent weightage in assignments and
fifty percent weightage in final exam ah now let me talk about the contents of the course
ah in this course ah since its about structure of materials we will be mainly looking at
ah the structural aspects so we will start with the the basic crystallography ah its
introduction ah what is the role of a what kind of crystal systems we have what kind
of crystal lattices we have ah what what is the role of symmetry in determining
the crystal structure and crystal systems we will also introduce you to ah um ah miller
indices ah and interest stresses in the structures so that one can correlate various properties
later on with the with various axis in the unit cells ah um because a lot of properties
as we know they have an isotropy ah um in them and then ah once we have obtain this
basic background and crystallography and ah crystal systems and ah device lattices we
will move on to structural materials so first in this ah sequence you will talk
about structural metals and alloys ah whose formation rules are different as compared
to other materials so in this case ah we will mainly look at for example rules and ah how
the metals ah um form various structures and their alloys and then we will move on to structure
of ceramic materials because structure ceramic materials i is formed by a complete different
set of rules because ceramics contain two different kind of a kinds of ions they contain
anions and cations as a result electro statistics plays a ah important role in determination
of these structures so we look at structures of ceramic material
such as sodium chloride magnesium oxide calcium fluoride etcetera and the materials which
are ah based on those structures and then we will look at another class of materials
that is the structure of polymers ah you know polymers ah and ah um perhaps glasses ah these
are different classes or materials ah in the sense that ah they tend to be ah they they
dont tend to be completely crystalline as a result the structure of these materials
is slightly different ah is quite different actually and ah ah and one needs to know about
what kind of structures ah these materials make and what is the ah what is the distinction
between polymers and other materials once we have known about the structure of
various classes of materials we will move on to structure determination how do you determine
the structure for example crystal structure of metals and alloys or ceramics ah and we
learn about actual diffraction in the in in that in that context ah the the basics of
x x ray diffraction its application to determination of crystal structure and things like ah um
crystallite sized strain etcetera and finally ah ah materials are not without the defects
we look at the defects in materials primarily looking at the point defects ah and ah line
defects and surface defects which are ah which are useful to know once you have had some
background in a crystallographic structure of the materials
so this will be ah end of twenty lecture series or forty lecture series ah or twenty hour
lecture lecture series in ah nature and properties of materials ah looking at the structural
materials ah subsequently in in part two ah ah as and when it is conducted ah um we learn
about the thermodynamics phase equilibrium phase transformations and properties of materials
subsequently so this is the summary of ah this particular module that is structure of
materials and introduction to materials nature and properties ah ok
thank you

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