Accession Number:

AD0269265

Title:

Thermodynamic Properties of Bi-Metallic Powders

Descriptive Note:

Quarterly letter rept.

Corporate Author:

NATIONAL RESEARCH CORP CAMBRIDGE MA

Personal Author(s):

Report Date:

1962-01-05

Pagination or Media Count:

11.0

Abstract:

The object of the program is to study the heats of combustion of intermetallic compounds as compared with mechanical mixtures of the corresponding metals. The program will consist of three parts Preparation of ultrafine powders, bimetallic alloy compound systems, Al B, Zr Al, Zr Si, Al Li, and Ti Si, and of the corresponding elements determination of the heats of formation of the above binary compounds and the oxides and related products of combustion of the above binary alloys the preparation of research quantities for further evaluation. A Parr series 1200 adiabatic calorimeter was installed, and its heat equivalent determined. A few preliminary runs on the determination of the heat of combustion of Al metal powder revealed that this reaction is very violent. A few runs were made to explore the field of solution calorimetry. It was found that Al powders are slow to react with 1 N HCl at room temperature. Only at temperatures exceeding 55 C did reaction rates become high enough to complete the reaction in the course of minutes.

Subject Categories:

  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE