Effects of pulse current on an aluminum powder oxide layer during pulse current pressure sintering

被引：31

作者：

Nagae, T ^{[1
]}

Yokota, M

Nose, M

Tomida, S

Kamiya, T

Saji, S

机构：

[1] Toyama Ind Technol Ctr, Cent Res Inst, Takaoka, Toyama 9330981, Japan

[2] Takaoka Natl Coll, Takaoka, Toyama 9338588, Japan

[3] Toyama Univ, Fac Engn, Toyama 9308555, Japan

来源：

MATERIALS TRANSACTIONS | 2002年 / 43卷 / 06期

关键词：

pulse current pressure sintering; hot press; aluminum powder; oxide laser; hydrogen content; oxygen content; contact resistance;

D O I：

10.2320/matertrans.43.1390

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The pulse current pressure sintering and hot press process were applied for sintering of aluminum powder produced by water and gas atomizing methods. The pulse current pressure sintering process could densify the water atomized powder in a short time compared with the hot pressing because it could remove the H-2 gas at lower temperature. The gas prevents sintering of aluminium powder. The tensile strength of the pulse current pressure sintered gas atomized powder which contains low H-2 was higher than that of hot pressed specimen. The electric resistivity of sintered specimens obtained by pulse current pressure sintering process was lower than that of hot pressed specimen. The oxide layer destruction was confirmed by this measurement of electric resistivity. The oxide layers were supposed to be fractured by the high temperature region which is attributed to Joule heat by contact resistance.

引用

页码：1390 / 1397

页数：8

共 24 条

[1]

Enjo T., 1982, J JPN WELD SOC, V51, P272

[2]

GERMAN RM, 1996, POWDER METALLURGY SC, P252

[3]

*I EL ENG JAP, 1978, EL ENG HDB, P64

[4]

*JAP I MET, 1993, KINZ DAT MAR, P3

[5] SURFACE OXIDES IN P/M ALUMINUM-ALLOYS [J].

KIM, YW ;

GRIFFITH, WM ;

FROES, FH .

JOURNAL OF METALS, 1985, 37 (08) :27-33

[6] SYNTHESIS OF HIGH HARDNESS INTERMETALLIC COMPOUND BY PULSE ELECTRODISCHARGE CONSOLIDATION OF AMORPHOUS TIAL POWDER [J].

KIMURA, H ;

KOBAYASHI, S .

JOURNAL OF THE JAPAN INSTITUTE OF METALS, 1994, 58 (02) :201-207

[7]

MAKINO Y, 1997, P INT S MICR PLASM T, P77

[8] EFFECT OF DIRECT-CURRENT PULSE DISCHARGE ON SPECIFIC RESISTIVITY OF COPPER AND IRON-POWDER COMPACTS [J].

MATSUGI, K ;

HATAYAMA, T ;

YANAGISAWA, O .

JOURNAL OF THE JAPAN INSTITUTE OF METALS, 1995, 59 (07) :740-745

[9] Preparation of functionally graded materials by pulse current pressure sintering of ball milled Al-50 at% Ti powder [J].

Nagae, T ;

Saji, S ;

Yanagimoto, T ;

Nose, M ;

Yokota, M .

MATERIALS TRANSACTIONS JIM, 2000, 41 (03) :457-460

[10]

NAGAE T, 1997, P INT S DES PROC PRO, P625

← 1 2 3 →