MATERIALS SCIENCE AND ENGINEERING -PACK
MATERIALS SCIENCE AND ENGINEERING -PACK
10th Edition
ISBN: 9781119721857
Author: Callister
Publisher: WILEY
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Chapter 10, Problem 1QAP
To determine

The two stages involved in the formation of particles of a new phase.

Expert Solution & Answer
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Answer to Problem 1QAP

The brief description of two stages involved in the formation of particles of a new phase is explained below.

Explanation of Solution

The two stages involved in the formation of particles of a new phase are:

  • Nucleation
  • Growth

Nucleation:

The development of very miniature nuclei of a new phase from the parent phase, similar to embryo is known as nucleation. There are two types of nucleation, heterogeneous and homogeneous nucleation.

In heterogeneous nucleation, nuclei produce at non-homogeneous structures, like surface of container, boundaries of grain and so on.

In homogeneous nucleation, nuclei or particles produce within parent phase.

Growth:

The growing phase of the particle is called as growth. In this phase, the particles transform into a stable nucleus and the size of embryo got bigger than the decisive shape. The process of growth forms a new phase nuclei within the parent phase. The process of growing continues till the new formed nuclei got stable and replace the parent nuclei.

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