Nazarenko V. The alteration patterns of interparticular contacts in the process of titan powder technological processing.

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0410U004149

Thesis Registration Form

0410U004149.pdf

Applicant for

Nazarenko Volodymyr Andryovich

Specialization

05.16.06 - Порошкова металургія та композиційні матеріали

Date of defense

05-07-2010

Specialized Academic Board

Д 26.207.03

Institute for Problems in Materials Science

Essay

The analysis of the compaction process of titan samples by cold pressing has been performed along with the examination of mechanical properties of porous titan samples obtained by cold pressing. The methodology of integral assessment of the properties of interparticular contacts by means of unitless coefficient (К , КЕ , Ке) computation with subsequent plotting of the contact quality vs. sintering temperature were developed. This is the first study demonstrating that the electric contact formation (determined by the diminishment of electric resistance) in the titan compacts occurs at the temperatures 50 - 100 оС lower than the mechanical contact formation (determined by the increase of elastic modulus). The physical contact is formed at substantially higher temperatures. The technology of titan part manufacturing in vacuum by hot impulse pressing (HIP) has been worked out. It was determined for the first time that the electric, mechanical, and physical contacts in the HIP powder titan are formed considerably earlier than with sintering. The analysis of the influence of the technological parameters on the structure and properties of the titan ribbon, produced by titan powder rolling, was carried out.

Thesis supervisor

Gogaev Kazbek Oleksandrovich

Official opponents

Сердюк Геннадій Георгійович
Роїк Тетяна Анатоліївна

Files

Автореферат--Автореф Таня-Наз-стр1-18.doc

Автореферат--Тит лист автореф.doc

Диссертация--Введение и гл 1.doc

Диссертация--ГЛАВА 2 .doc

Диссертация--ГЛАВА 3.doc

Диссертация--ГЛАВА 4.doc

Диссертация--ГЛАВА 5 и Выводы.doc

Диссертация--Литература .doc

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